Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b90d4f34ef6f778…

MALICIOUS

PDF

80.2 KB Created: 2021-03-04 17:30:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: aa51e603b1cc87e2ee43a824723bae2d SHA-1: 14a60696a12903393ceeb628caea1e3ca9bcc102 SHA-256: 0b90d4f34ef6f778eafee88ea4caf844ab4a49d7682e5e326dc070851507a413
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution T1555 Credentials from Password Stores

The PDF contains numerous links to external domains, many of which are associated with link farms and disposable hosting, indicating a phishing or credential harvesting attempt. The heuristic 'SE_MFA_LURE' strongly suggests the document is designed to trick users into providing sensitive information, such as one-time codes or MFA approvals. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious intent to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://zajinet.ru/award?keyword=one+direction+rapping+fresh+prince+of+bel+air+lyrics PDF link annotation
    • https://cdn.sqhk.co/xupixawina/geUmWz4/90212494133.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/10738913436.pdfIn PDF document text
    • https://cdn.sqhk.co/bogijifaviba/hglPjcq/51728309723.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375694/normal_5fe7d1e1f1632.pdfIn PDF document text
    • http://boothattendant.com/607631821898sr34.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478946/normal_60085e9edccff.pdfIn PDF document text
    • http://alkim.xyz/8693379663913ayb.pdfIn PDF document text
    • http://homiak.fun/cnbc_halftime_report_time0gts5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377663/normal_6005b9cf3f71e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379987/normal_60126e022f417.pdfIn PDF document text
    • http://playmarket-online.com/64087776891xkud.pdfIn PDF document text
    • http://parkingtest.xyz/fingerprints_of_the_gods_the_quest_continues64a0f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://faxiruvud.myartsonline.com/gimabigusemulomasizem.pdfIn PDF document text
    • https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_130807100f1749039e35ada38a32b1ce.pdf?index=trueIn PDF document text
    • https://c2c662fa-00ac-4c69-bf5d-04da7d6c99e2.filesusr.com/ugd/9b33c5_9a7c849c9a594edfbd7f91510f3b389b.pdf?index=trueIn PDF document text
    • http://wizigipixe.atwebpages.com/how_long_to_cook_sweet_potatoes_at_350.pdfIn PDF document text
    • https://f07eb630-23ff-4298-a1df-d7940f1ba2dc.filesusr.com/ugd/097a5b_e44991d3938e4254a624d5158d48c281.pdf?index=trueIn PDF document text
    • https://318abaa7-a496-4882-a5ef-186b1d719b20.filesusr.com/ugd/ff2e65_c6c64aa54b904bd8a9d7a5765595c629.pdf?index=trueIn PDF document text
    • http://wumugajus.onlinewebshop.net/dyson_dc41_troubleshooting_no_suction.pdfIn PDF document text
    • https://5637a596-61ce-4e67-8953-8fd9cb84b940.filesusr.com/ugd/c20ea7_763195ae3aca4730971eefe811c44ab8.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_off0000fa9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9B 5688 bytes
SHA-256: b91bf84dae71c83c06d7a492365d9238dbcd674f266952d9c4110bd1f6c68359
font_01_sfnt_off00010df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF3 10816 bytes
SHA-256: 32023eb44a32c7b38fdb5c6194c5fc75007bd0f193c5f7ebc10d103a78e55017

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