Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c7bb62016154089…

MALICIOUS

PDF

80.5 KB Created: 2021-09-02 22:53:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d498ec9fc88839f0dd47404caf91353d SHA-1: eea0d72272b347bfa2e02c7e585b88d46fe9a152 SHA-256: 1c7bb620161540893b4f7d9761abd8d02c44be79c219905235dbf0be6d3cdc5c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lure users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • 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.
  • 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://maffart-guy.com/userfiles/file/zojepoto.pdf In PDF document text
    • http://surmounttravel.com/userfiles/files/8021748098.pdfIn PDF document text
    • https://bhavanarayanaswamy.org/userfiles/file/jogafanuk.pdfIn PDF document text
    • http://location-venise.com/italie_documents/files/59623973917.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2479aea0af---11696770114.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f35523f684---98497400819.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/wugisaku.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/lalarewasamolezusinero.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/gojan.pdfIn PDF document text
    • http://tentimesneedlehill.com/UPFILE/userfiles/files/kizike.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160985660d62aa---jakubudovelizopopazapa.pdfIn PDF document text
    • https://farmacieitaliane.com/documenti/file/bometof.pdfIn PDF document text
    • http://fairway.cc/images/blog//file/wigalefojutesudeju.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/74fp0mrk87ckp6b0b01q1ir5an/22011645932.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/zawebogapipujewefibov.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/a597bb2f924d2e53ca7c133cf6681c8b/wuban.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/67108092864.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/pidutojaluxusija.pdfIn PDF document text
    • https://abeess.com/userfiles/file/5550268174.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610818d2a7d22---wejizawezaninig.pdfIn PDF document text
    • https://www.padanguparduotuve.lt/ckfinder/userfiles/files/61809730275.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/7vg75u8mmoaumo7cn7qnptmngm/wosorelesusaju.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfd75245fd7---minugumil.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/kotipadaxarateliwe.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/66382626489.pdfIn PDF document text
    • https://kipass.fr/userfiles/file/gitilikujapepifuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=haier+chest+freezer+hcf148a+manualPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BD 17000 bytes
SHA-256: ba51ee2b543c0a3b99ac964acc02b5eebb415b5bc0f721a6e3c28f8c90a39b8e
font_01_sfnt_off000102d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AED 10972 bytes
SHA-256: a4919f12b3161060957832ed772c2b7ffd5e82deaac3c602037f06ff5c230688

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