Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2a3bd46c4a601cb…

MALICIOUS

PDF

116.6 KB Created: 2021-03-31 06:47:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9002637193a2a247d3987879a0f958d8 SHA-1: 5b26ce2d82c0d3a781c39ee39c73db6b870e49aa SHA-256: a2a3bd46c4a601cbd2089175e8b2e8cb15ac88478fdb5836b0d5fdd752827990
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://druttle.ru/strik?utm_term=how+to+become+a+certified+vet+tech PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412767/normal_6052b1a25d19b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485149/normal_5ff44ffa30943.pdfIn PDF document text
    • http://fitatuvepejozo.sportsontheweb.net/gatikiromoguxa.pdfIn PDF document text
    • http://merexazumebenag.medianewsonline.com/adenosina_ampola_bula.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482405/normal_5fea34ed9a7ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381547/normal_6050b975d195f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382778/normal_5fdf46124e33e.pdfIn PDF document text
    • http://tiwujatujoput.mygamesonline.org/zevubugalobivinagusu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471960/normal_602a9ed55c127.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://71f68c9c-1037-483c-a0ca-f268b7ddd3c8.filesusr.com/ugd/87fdc7_27be65ae739d46179e0dd970455d7a46.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/simujix/28315332457.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/59006519405.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/2972359053.pdfIn PDF document text
    • https://4c2674ec-1430-4cec-a455-d6a35d10586e.filesusr.com/ugd/38955b_6fa6e54cfe0745c39849394fd8ab8f18.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/how_to_trade_gaps_at_opening.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/pagubimalumisedibefa.pdfIn PDF document text
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_542a77089e314c918eff4ba3a3fcf27e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/10134495749.pdfIn PDF document text
    • http://zedowep.atwebpages.com/mefaxuw.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/pavojegajozexosus.pdfIn PDF document text
    • https://1e1f235d-56dd-4976-b20d-d38e3fe7b172.filesusr.com/ugd/210b45_d4505aea1f654531aff3c2ae5559b20a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bagisi/80134651888.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/the_girl_with_the_dragon_tattoo_imdb_2009.pdfIn PDF document text
    • http://lesidiwajenowil.myartsonline.com/51667350454.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_off00018b7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B7F 5304 bytes
SHA-256: a8e4a50ed19322918105bdf91857b84361d6fbf3344f37299c6b1ba9c83c7155
font_01_sfnt_off00019d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D76 11452 bytes
SHA-256: 2aeeab7572f80e78758c77dd059063dfe6e27c6bc20b9699039aa6d0a752f14a

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