Malicious PDF — malware analysis report

Static analysis result for SHA-256 442a222e4ca9a71e…

MALICIOUS

PDF

77.3 KB Created: 2021-03-06 16:33:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f167502442054adf611c68562cb5010c SHA-1: 2faabf3639cb6e284f21084d342f940af0900f7a SHA-256: 442a222e4ca9a71e38df2a34e903f0aaccba7f18b5d0bfda750322b9d966af30
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The document body, though heavily obfuscated, mentions 'Dewalt dcd771c2 20v cordless drill driver kit', indicating a lure to entice clicks. The presence of PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics, along with ClamAV detection as Pdf.Phishing.Trojan, strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/award?keyword=dewalt+dcd771c2+20v+cordless+drill+driver+kit PDF link annotation
    • http://hargotel.xyz/5315083667sup3c.pdfIn PDF document text
    • https://gefatute.weebly.com/uploads/1/3/5/3/135345711/6918445.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/hjihNgh/76730819330.pdfIn PDF document text
    • https://cdn.sqhk.co/rureroso/hfGkgdR/83764570795.pdfIn PDF document text
    • https://mujekakuvegaxum.weebly.com/uploads/1/3/2/3/132303245/d129b3.pdfIn PDF document text
    • http://5coupon.info/thiwanka_dilshan_new_song_audio80v25.pdfIn PDF document text
    • https://zurukonovode.weebly.com/uploads/1/3/1/3/131379219/c24e653e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410730/normal_5fef176848834.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/ghibjiv/97830002736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368471/normal_601f326a93181.pdfIn PDF document text
    • http://tizezs.xyz/what_is_definition_of_full_time_equivalent_employee9tyg0.pdfIn PDF document text
    • https://cdn.sqhk.co/fagijopi/dOJzHvj/99202663428.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408343/normal_602bfaeda21c7.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/cijW7hd/super_sonic_the_hedgehog_full_movie.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c931c956-7f53-4e4e-96dc-27d7f003ba63.filesusr.com/ugd/b80c10_8aacc8e7691a4779bf9652807bad1b82.pdf?index=trueIn PDF document text
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_02d11d4d83ed45d78616fb203afdfc65.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zidenigad/nakamichi_cassette_deck_1_manual.pdfIn PDF document text
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_6dc17408c42a4f60b87d82319442f792.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/breakspear_school_ickenham_uniform.pdfIn PDF document text
    • https://50aad03f-9d2a-47e6-be13-abd12f321b17.filesusr.com/ugd/3fd638_ea3b0c6ff033491f873271e3a97751c0.pdf?index=trueIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF000 5552 bytes
SHA-256: ebbb16af5b93dcdbae34fa56950148fc25340b7da55b611393b85befefb25018
font_01_sfnt_off00010324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10324 10704 bytes
SHA-256: ba211a83fbd13ec68a83ee75e8d768f6e9449e2792bf6960b6f430ffd7ce4cf3

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