Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aa134546301948a…

MALICIOUS

PDF

71.2 KB Created: 2021-03-27 14:24:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 805513d9760049b909d9b0354aa5da1b SHA-1: b0569f0a0b593dcc05648f5baa40ee2c8697eeb1 SHA-256: 2aa134546301948a85dac3c9ee0ff14d1595e4367144b6665593bfdf78dc6f56
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a PDF SEO link farm. The primary URL, 'https://zajinet.ru/wix?keyword=ixl+mark+sheridan', is flagged as a redirector, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://zajinet.ru/wix?keyword=ixl+mark+sheridan PDF link annotation
    • https://pivozedotafi.weebly.com/uploads/1/3/1/0/131070355/87020a.pdfIn PDF document text
    • https://depuxozepol.weebly.com/uploads/1/3/4/3/134377374/f89ead5.pdfIn PDF document text
    • https://gibejeki.weebly.com/uploads/1/3/1/4/131438187/forokaxetomevu-jorap.pdfIn PDF document text
    • https://gorofegi.weebly.com/uploads/1/3/4/4/134462705/fanibejotiwuratifi.pdfIn PDF document text
    • https://kererivodukeje.weebly.com/uploads/1/3/5/3/135303009/9188244.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/gafiwuxozujosafol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0422a399-5082-4c0a-b4aa-61ce4e945e0b/71695162919.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86e10745-063b-4d32-8203-625a62fc28a7/spiritual_authority_great_bible_study.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58540d70-e848-4dc8-b82d-d287f8c762e8/xoxinawizigafisute.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/21836846039.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/como_aprender_ingles_en_7_dias_ramon_campayo.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/93467037000.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/what_is_visual_perception_occupational_therapy.pdfIn PDF document text
    • http://podazowek.epizy.com/wowikavu.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/crib_flat_sheet_size.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/futisojil.pdfIn PDF document text
    • http://guwaduroredidaj.rf.gd/sajojab.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/72216480566.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/endeavour_energy_annual_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/cannot_format_mini_sd_card_write_protected.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_off0000d95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95D 5132 bytes
SHA-256: 12ee5b3a09ea9197138366cd1b8874bf4410d1e4ba8d9a09e3e72c69c3c1a71c
font_01_sfnt_off0000eaa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA2 10832 bytes
SHA-256: 6bb31330d314c5068247d563e2001582f3398acc2f4d212a81516e06380ebe84

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