Malicious PDF — malware analysis report

Static analysis result for SHA-256 8152f7a7217d166f…

MALICIOUS

PDF

96.5 KB Created: 2021-06-26 06:35:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 78c8244b552aca98084414672d0420e0 SHA-1: 1be824767558b8130d5ed6e925da7699731d3e21 SHA-256: 8152f7a7217d166fcd8b74e783badda37a4e59658c2697b45443c651b6795237
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely responsible for initiating the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 http://emotionpicturesfestival.gr/userfiles/file/62321550508.pdf In PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/nshm7sust995bb2gktbqpbifn0/bakulilevi.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/muzewilamufokojibi.pdfIn PDF document text
    • https://wecareprogram.org/images/file/tuxetakaxugukavudeve.pdfIn PDF document text
    • http://thermogroup.ru/uploads/files/19702032978.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16079ddec4742a---gejar.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/68799745213.pdfIn PDF document text
    • http://ahdjcm.com/upload/files/menile.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/3127c2e8253be35d98bef5144b808a75/gukalezaxejejavakiluwifaw.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/d95d736fdb86bb9356d9a5e5d839e694/xelegor.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/57778452947.pdfIn PDF document text
    • http://grandrosso.com/js/upload/files/rozirowutefelabaz.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16079836354814---xowilenikisipex.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160758757938fe---xivilixudig.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021050113545553.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/gduiiooq7nmingtbt42i4bt1r7/58633657923.pdfIn PDF document text
    • https://hostmegasoft.com/calisma2/files/uploads/70492456068.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608282dfbc29a---gusabifakujenenupuxidufas.pdfIn PDF document text
    • http://kozelskadm.ru/files/uploads/files/puxagevazojexi.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210507131423.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/72700159597.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/lewalexenazim.pdfIn PDF document text
    • http://alternatifmedikal.com/img/userfiles/files/12859585517.pdfIn PDF document text
    • http://bkbflooringusa.com/userfile/abbey/file/lapezuje.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/rmjqriebq42bsaelq3l05nbnsi/fotanoxatovavib.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b715e2421c0---gamozipemabosagilakop.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/7c1f4102b04299f86888a289c1fcca2a/25459049135.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=ankara+short+flare+gowns+2020+with+sneakersPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A3 10892 bytes
SHA-256: 37ab2acdf7f7fc9585fc7953492986882f049ed5590b2ad79b716082bbebe4dc
font_01_sfnt_off000119f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13205 17108 bytes
SHA-256: a3268280a4fa9edefad12d6d573dfc77ee93bd05266daf363c79ea42570b34d8
font_03_sfnt_off00015e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E5A 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467