Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8beb4db34df19fe…

MALICIOUS

PDF

78.2 KB Created: 2021-02-19 15:16:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a0a4bc3a658731f329ef3726a0e49679 SHA-1: 71dfb1aaa996b5e26362928e9aaa508aa80a6368 SHA-256: e8beb4db34df19fe339b9ba2e0c1fb6cf1d5bec32942f52880b47e76806f1f87
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to disposable domains and are likely used to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a deliberate attempt to create a link farm on disposable hosting, further supporting a phishing or scamming motive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=what+are+taco+bell+nacho+fries+made+of PDF link annotation
    • http://ubsvp.com/motorbike_games_appsp9kix.pdfIn PDF document text
    • http://lolkek.xyz/15945505386vr6hz.pdfIn PDF document text
    • https://mafexanilexa.weebly.com/uploads/1/3/0/7/130739060/1166859.pdfIn PDF document text
    • http://site-shop.xyz/90394255387iyonj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383446/normal_5fc89e5e6e246.pdfIn PDF document text
    • https://luwujapi.weebly.com/uploads/1/3/4/7/134751522/furimobuv_muliporikorad_sapaketinidug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366646/normal_5fd680db0c8bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501659/normal_600d7ef38c383.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/igdrjjI/wechat_pay_app_store.pdfIn PDF document text
    • https://cdn.sqhk.co/woselukafo/hejpYzw/pixel_combat_zombies_strike.pdfIn PDF document text
    • http://xtreme-sport.ru/disney_plus_login_issuesjkogh.pdfIn PDF document text
    • http://ch-redirect.icu/zutofufa9pb.pdfIn PDF document text
    • http://passive-income.ru/download_grand_pixel_royale_battleground_mod_apkxa5k9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuzuzifo.epizy.com/aadhar_card_correction_form_post_office.pdfIn PDF document text
    • http://tirejazanapo.epizy.com/dobatose.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_off0000f302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF302 5416 bytes
SHA-256: ee7062558a2641a38aa2790068aa9f33c3ac072371f6159a333e156a83eed224
font_01_sfnt_off0001054e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054E 11208 bytes
SHA-256: d2ba99bf29c17cc3833e3f03b3935772cbaea8bb06eefbfbbe287461051631e5

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