Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb072ae683500d49…

MALICIOUS

PDF

74.1 KB Created: 2021-02-08 16:53:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 094521a6b16d5186a12e909667482b43 SHA-1: bde7bcc6a0c5ed290b36ea90eaea5fe925e9976c SHA-256: fb072ae683500d498a96c1b4045c91dc8fc0c11345c25a19a640ae68f58f55d2
256 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://vajefusuvujob.weebly.com/uploads/1/3/4/4/134464162/zesanejabelatotut.pdf.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jottigo.ru/wb?keyword=angola%20embassy%20visa%20application%20form PDF link annotation
    • http://pizovanijeb.22web.org/vuburovibudojupozimafav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369648/normal_601bb16ad6965.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497666/normal_5fdd366e24cda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413118/normal_5fcd623f47d4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404103/normal_5ff609ff6f39e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421056/normal_6019b64a48c9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421629/normal_600ff30356066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416304/normal_601062c8b8d87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426688/normal_5fca202380390.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449009/normal_5ff0b2a1b5bbe.pdfIn PDF document text
    • https://vajefusuvujob.weebly.com/uploads/1/3/4/4/134464162/zesanejabelatotut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403539/normal_600cccd1cd263.pdfIn PDF document text
    • http://1xbet-registr.site/gezawanaguzabon4ur55.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lapapagidufabo.rf.gd/online_compliance_reporting_system.pdfIn PDF document text
    • http://fumojaw.epizy.com/42525741126.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_off0000e4c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C2 5628 bytes
SHA-256: 1d5124de023f7672dfc7a831811d8368af6ccf7d6c78b01f28aeececc96f5c0d
font_01_sfnt_off0000f7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E5 10572 bytes
SHA-256: c18f512723f6ddcbe18d245056eeb641c892fe2fcca302092c54372c0cc792c0

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