Malicious PDF — malware analysis report

Static analysis result for SHA-256 f22f17de34c4f801…

MALICIOUS

PDF

75.0 KB Created: 2021-02-26 07:57:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ec830054cc3a3f652fdb3b652fbf920d SHA-1: 7a5f772c8a872d5efcb7be8465a4e7b7abd3150b SHA-256: f22f17de34c4f8013658b07f487a4f51f5f690feb68efeca4e3ed527f01f22cb
156 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, a common tactic for link farms and phishing. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, and one of the primary URLs points to a domain associated with distributing PDF files. ClamAV also detected this as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://baarspo.ru/award?keyword=how+to+make+a+covid+safe+plan PDF link annotation
    • https://toxoladosa.weebly.com/uploads/1/3/4/4/134479392/4ea5945bf1.pdfIn PDF document text
    • http://raifaisentgo.online/komik_spiderman_bahasa_indonesia0fvls.pdfIn PDF document text
    • http://retys.space/allen_bradley_micrologix_1000_manual359zk.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/how_to_install_adobe_acrobat_pro_dc_on_a_second_computer.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/374dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381964/normal_5fd61008c8b18.pdfIn PDF document text
    • http://vowujebotoza.mywebcommunity.org/is_beats_solo_3_worth_it.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481272/normal_6025a56fe7b1e.pdfIn PDF document text
    • http://dfahsdfgjsfg.online/opensooq_mecca_street_amman_jordandnzm5.pdfIn PDF document text
    • https://samojosaletope.weebly.com/uploads/1/3/4/0/134017273/borinudodokeb_watuzepi_kovazeboxif.pdfIn PDF document text
    • http://ozalupa.space/47966796794eam1y.pdfIn PDF document text
    • https://texelepetorabaj.weebly.com/uploads/1/3/4/7/134738155/lotakexibuvepa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383160/normal_5fce02438a206.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rogofideb.onlinewebshop.net/beats_studio_wireless_headphones_noise_cancelling.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/tosifemelibud.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/dejugu.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/goku_black_vs_android_17.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/24669230698.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7C 5380 bytes
SHA-256: 0107ee4c4eb6986a2f36940b4eb9fec3fdc528abc448d44769c691ab3f25e201
font_01_sfnt_off000100d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D7 10208 bytes
SHA-256: af86aa3409f178eea91e5d35bdfa6a9c5f632e6a2b1408fbd37e3a7baa8e5727

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