Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a752fab2e998c4…

MALICIOUS

PDF

73.3 KB Created: 2021-02-23 13:01:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b704bd1d93da0b6a232d19e1296160bd SHA-1: 07e7bac7534846572a60f11ff14910e45677db00 SHA-256: e6a752fab2e998c4c8dfdcffefa7b7c2180064226901a72edac8ebbfea84f21e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with the primary one being 'https://maypoin.ru/123?utm_term=flight+weather+radar+uk'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload via the linked URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://maypoin.ru/123?utm_term=flight+weather+radar+uk PDF link annotation
    • http://skidki-day.shop/fugusedujoguxabas88pr.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/SjdBQjg/jadeberawofadinoketibidiz.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxozamikoge/fnWkGcA/boulangerie_candles_wholesale.pdfIn PDF document text
    • https://cdn.sqhk.co/japokaxe/5jjgfgc/jitujebabumopafex.pdfIn PDF document text
    • http://senteber.site/88820014241xvs7q.pdfIn PDF document text
    • http://lnstagramverifiedbadge-form.com/el_poder_del_pensamiento_tenaz_normagwask.pdfIn PDF document text
    • http://1xbet-sportstavki.fun/what_does_memento_mori_meansye4iy.pdfIn PDF document text
    • http://betmoy57.com/what_were_the_three_types_of_land_grants_in_new_mexicou2jq3.pdfIn PDF document text
    • http://coolvdomaion.online/how_to_sit_thich_nhat_hanhwt787.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeforms.com/7979383058312gn7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446772/normal_5fca62632086f.pdfIn PDF document text
    • http://podeves.xyz/87542396946oveg0.pdfIn PDF document text
    • http://uaregroup.com/word_association_test_with_sentenceslitaw.pdfIn PDF document text
    • http://fakts.design/60741148782aq47e.pdfIn PDF document text
    • http://itdiscounts.pro/89633039152cya0b.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/batoragubukepo/51482139186.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/manualidades_para_navidad_2018_en_foami.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/elite_dangerous_horizons_exploration_guide.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_off0000e297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE297 5020 bytes
SHA-256: 11a26a3202179ef80d8cf80b626fc3a805a8d6b3e13fb2fdc09ecc19d176b33c
font_01_sfnt_off0000f3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B4 10772 bytes
SHA-256: c7b7245f18d09e71846e87e3b5401d54c5a238a427bd55efddc19e0c78148710

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