Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f67580d090ca14b…

MALICIOUS

PDF

61.5 KB Created: 2021-02-04 06:52:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 396e18d783a44a7a65f214bc4211f523 SHA-1: f17141f57b5f2e701f70c89089acb3582fb4dde6 SHA-256: 0f67580d090ca14ba4033ec74ac682827a7a4efea14b2e84a1e9e8edaa752db2
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are structured as a link farm, suggesting an attempt to drive traffic to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or a scam. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attack pattern involving redirection to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://jacksth.ru/123?utm_term=miami+university+middletown+majors PDF link annotation
    • https://veximukexapi.weebly.com/uploads/1/3/0/9/130969798/petadebobuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489601/normal_5fe89f37d1ca6.pdfIn PDF document text
    • https://cdn.sqhk.co/kafufojugure/higehgg/tufoximiz.pdfIn PDF document text
    • https://cdn.sqhk.co/nisosawero/XtH9fB3/5150977871.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466146/normal_6001f43ea1a24.pdfIn PDF document text
    • http://canlisohbetim.net/nujipebuzejup97fvz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404103/normal_5fdd7ed129f97.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/Mgff7hb/55714099099.pdfIn PDF document text
    • http://italdom.fun/betatu6155j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383566/normal_5fea188082860.pdfIn PDF document text
    • https://cdn.sqhk.co/govulasem/xidgYge/discover_mobile_app_developer.pdfIn PDF document text
    • https://cdn.sqhk.co/xizefonuma/ygg8j8a/voice_recorder_for_windows_7_32_bit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454971/normal_601b118a5d64f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471703/normal_601070998510a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422180/normal_6002ab2014d2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470685/normal_600101a6c6cac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475577/normal_601990d98b7bf.pdfIn PDF document text
    • https://cdn.sqhk.co/fafujedajir/BUHJXha/can_you_exchange_gift_cards_for_bitcoin.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/egiyYgc/1332062652.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000b59b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB59B 5308 bytes
SHA-256: 0da1bd816f5b0d6beea1697ea5eda194765ead1a612f76471fc8256038293384
font_01_sfnt_off0000c7b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B6 9584 bytes
SHA-256: d5b4499378a9d0dadcb1c186c0f3b86e0eb99ca993a2e97fcbc28ef048c1b1d6

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