Malicious PDF — malware analysis report

Static analysis result for SHA-256 f01a1474fa059f30…

MALICIOUS

PDF

108.1 KB Created: 2021-04-09 11:24:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9f6b8e1eddc38c2f0b481ae5732aa593 SHA-1: 1bf81b20f99ae6d3e1b9947f2114d7721592437a SHA-256: f01a1474fa059f306494e845cb066c38a64d2fa233fa12fc6f73c35cf43c8dec
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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://ponafet.ru/strik?utm_term=wsjt-x+2.1.2+manual+download PDF link annotation
    • http://vabakavolageni.22web.org/84249015334.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422637/normal_600bfcbc7a98b.pdfIn PDF document text
    • http://poposiruta.mywebcommunity.org/what_to_write_on_verification_of_property_condition.pdfIn PDF document text
    • http://lalikexitaxixix.getenjoyment.net/pomabevunesewiketunesipa.pdfIn PDF document text
    • http://wwbook.org/mackie_1604_manualysndy.pdfIn PDF document text
    • http://findfreegirl.com/autocad_3d_basic_exercisesuiqmm.pdfIn PDF document text
    • http://konsalting.info/papukizaralefitefigitidfm7iw.pdfIn PDF document text
    • http://waparudadip.mywebcommunity.org/wepoganewik.pdfIn PDF document text
    • http://badoxik.scienceontheweb.net/canny_edge_detection_matlab_code.pdfIn PDF document text
    • https://junerokiwoji.weebly.com/uploads/1/3/0/7/130775834/2807590.pdfIn PDF document text
    • http://edaruzal.xyz/crossover_symmetry_training_guide_downloadwesk8.pdfIn PDF document text
    • https://zuzivosojix.weebly.com/uploads/1/3/0/7/130775151/4060722.pdfIn PDF document text
    • http://shothard.site/56198671133wblzt.pdfIn PDF document text
    • https://pelimabogex.weebly.com/uploads/1/3/4/6/134685965/vuxofi_pebumiji_kemixewelez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475715/normal_5ff60416db7e2.pdfIn PDF document text
    • https://gisafonenum.weebly.com/uploads/1/3/5/3/135323636/2ca528c4dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494883/normal_5fe0769fbed31.pdfIn PDF document text
    • https://vonazevuza.weebly.com/uploads/1/3/4/6/134603973/joren-wapifemunule.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sixexelotu.epizy.com/40400957438.pdfIn PDF document text
    • http://pisasegobure.epizy.com/fejajanid.pdfIn PDF document text
    • http://dekegafazuwad.rf.gd/google_revenue_model.pdfIn PDF document text
    • http://zevusup.atwebpages.com/koketilekovugukowos.pdfIn 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_off000168a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168A2 5372 bytes
SHA-256: ffa1766eb9395f360397f4c478c3ba1f65ca09ff37f008822f34cf7d63194008
font_01_sfnt_off00017b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B07 11596 bytes
SHA-256: 500e7efa5111ebf49bd134e65219ce2d99645ef695b0380ead3938dc07a55b0f

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