Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f24d0522667cfd6…

MALICIOUS

PDF

121.3 KB Created: 2021-07-18 10:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 92ad118fff4b89742ce38a464503ce0f SHA-1: 02f613a4982d6fcf2f5507336cb2421f34661dba SHA-256: 1f24d0522667cfd67acc74cc5bc88e5503963563eb20c30ed38033dccf5438f7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and a link farm pointing to compromised WordPress upload storage, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to trick users into downloading a secondary payload disguised as a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9703

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://angel-juicer.com/FileData/ckfinder/files/20210622_113116DE4648090E.pdf In PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbbaa8ad25---7966843628.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609018959de8f---nagim.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/tomigufonudiralupujar.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/28230693006.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-6/file/vufirogaxojakivu.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9c6306bb3---23340621062.pdfIn PDF document text
    • http://turnwealthy.com/ckfinder/userfiles/files/2337338248.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16084561803e82---lamefuz.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbc51f3833---jotadokobu.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/zuluwobinukovewilasitupa.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/zebubisubotovejejolotes.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160712a575512e---75419994156.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/60572243778.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c87a3c5822---zubasajopuzinuwilinexidoz.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/korat.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/4338a57ccab9791811bc0f4caa254bd5/5369656470.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/fedajetabofo.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945070ad5e4---lepabiguxugisebiku.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/17fc0f61f3879b0809aef23fdc343b04/penovesipisewavoj.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cff1e14f260---wuzenafuruvanaxirinik.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082c3411bcef---7022693697.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/4q1pr7esft3102ten5fkjlspi3/94482862088.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/6e645d49cc9e25b0be75d2cf645aea0e/55886575588.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/a0cc37d3a96768aa7ee197a44d3aa6a4/jaremagozu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=number+of+malayalam+alphabetsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001392a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1392A 19712 bytes
SHA-256: 73105ba4d92ecc902f604b467ce5ce8fff0472ba7b0d34b5f8a1c0e2891b8661
font_01_sfnt_off00015b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B9F 10756 bytes
SHA-256: 3838de7d74fe0d6e636906212d4a76dabe6c89e5d9722b67d839ae9560254ffb
font_02_sfnt_off00017433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17433 2748 bytes
SHA-256: 4b34600235d8a66ef50761c5eecb30b00dcdb456c35677c299be45e814f6d945
font_03_sfnt_off00017fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17FAC 24344 bytes
SHA-256: f704a227f11eae0d2d777b2c0b8577a9acc128c53b81eeed5a9c909199dc08b5
font_04_sfnt_off0001be69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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