Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e7ddeaa6be7682f…

MALICIOUS

PDF

89.8 KB Created: 2021-03-26 07:24:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f9add896ef8f3e3852e06c9ab1cc5303 SHA-1: 920cbec0afe72a823fbddca2f2f0bbc6b5d67f45 SHA-256: 3e7ddeaa6be7682fa5fe528d639e5b863b6d77f0908abafac44f221956bf62cf
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mezovuduw.ru/123?utm_term=wiley+latex+template+overleaf PDF link annotation
    • https://wefizaxire.weebly.com/uploads/1/3/0/9/130969527/voxuwazeditawede.pdfIn PDF document text
    • https://cdn.sqhk.co/pofoxubo/JhipBpK/dancing_balloon_manufacturer.pdfIn PDF document text
    • https://gokixojegesefa.weebly.com/uploads/1/3/4/8/134864476/22836c8622b.pdfIn PDF document text
    • https://puluzoxaxidu.weebly.com/uploads/1/3/2/6/132683087/muzijorub_ludem.pdfIn PDF document text
    • https://rezapikuxodet.weebly.com/uploads/1/3/0/9/130969426/1a9efd.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/20qjsjg/30546356080.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/qCyRcJP/fdic_call_report_glossary.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/8951101.pdfIn PDF document text
    • https://mifopubulu.weebly.com/uploads/1/3/1/6/131637027/gojar-bovilekokij.pdfIn PDF document text
    • http://vipmanmarket.space/denawazupo0ogay.pdfIn PDF document text
    • https://novenoberube.weebly.com/uploads/1/3/0/7/130776641/5a5bf2586f.pdfIn PDF document text
    • https://vekibapovadivoz.weebly.com/uploads/1/3/0/8/130873848/pudisa_kotepom.pdfIn PDF document text
    • https://negofajosodin.weebly.com/uploads/1/3/5/3/135314147/2992444.pdfIn PDF document text
    • http://yewes.fun/popeil_pasta_maker_recipe5hzkr.pdfIn PDF document text
    • http://okstore.info/27588773945gp0bx.pdfIn PDF document text
    • http://legendnat.space/namakanuxumejovixis5ttf.pdfIn PDF document text
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/nabekufi_pikumovik_fatibuxeli_banulevuramepo.pdfIn PDF document text
    • https://safalijig.weebly.com/uploads/1/3/1/0/131070993/9366128.pdfIn PDF document text
    • https://kofiserifopame.weebly.com/uploads/1/3/2/7/132741397/6139026.pdfIn PDF document text
    • https://cdn.sqhk.co/tamejenonisi/2ijhjij/miniclip_battleship_general_quarters_2.pdfIn PDF document text
    • http://organize.shop/ganelopivunolijurodd3pjm.pdfIn PDF document text
    • https://jilukixewe.weebly.com/uploads/1/3/4/0/134042659/gotowokesoko-nibonosirud-wedijubiri-nevodibi.pdfIn PDF document text
    • https://nerisowale.weebly.com/uploads/1/3/1/4/131412290/7940911.pdfIn PDF document text
    • https://milolumixi.weebly.com/uploads/1/3/4/4/134459833/5657587.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cee4a208-09ac-40e0-983f-4c2cc776acbe.filesusr.com/ugd/5ed537_086bcc75bb164dc0b09a18a3be3e5bd5.pdf?index=trueIn PDF document text
    • https://21c505bb-01ca-4817-a549-4ed1ebba5040.filesusr.com/ugd/7d7105_8e6ad5f050174ea69574ab4f21f0a082.pdf?index=trueIn PDF document text
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_5641407cb15d461db9bf22ae12518403.pdf?index=trueIn PDF document text
    • https://4c72699b-aa2e-4dc8-8bd5-1a54e8f938a6.filesusr.com/ugd/f3cb45_fd927ea4120b46d3a46a2f430a999b5c.pdf?index=trueIn PDF document text
    • https://054d5c26-596f-48a3-87a7-0fc79031e5db.filesusr.com/ugd/599026_e1d3c3736601452bad6bedf3daeb42a0.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_off00011d34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D34 5112 bytes
SHA-256: ae31432ddd2d3e4a00c2ea0f77bdcdf9f0d21cc52d1b22aea988e9ac1bb7aa8a
font_01_sfnt_off00012ea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA0 12544 bytes
SHA-256: 52043237b23238b004a5735878d17a8c3c2f5cb6bacf31ce79d1cd9291032b44

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