Malicious PDF — malware analysis report

Static analysis result for SHA-256 50284944ca16c44d…

MALICIOUS

PDF

75.7 KB Created: 2021-03-04 16:53:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 069292182f56e4fe77299c3feb34ddef SHA-1: ac2e35e10dacdc4a1474f9dfe96300b60ae9d5b9 SHA-256: 50284944ca16c44d28e7cb3702e921600a653c129af3858c5fc86773732ec08a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically targeting a search term related to 'petsafe shock collar repair', suggesting a phishing or scam lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of many external links and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' point towards a campaign distributing malicious content or leading to phishing sites.

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 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/wb?keyword=petsafe%20shock%20collar%20repair PDF link annotation
    • http://vivekawiga.sportsontheweb.net/the_trobrianders_of_papua_new_guinea_ebook.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454809/normal_603569a5daabb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454825/normal_60087ecae9c1a.pdfIn PDF document text
    • http://gizigevom.mygamesonline.org/59354875250.pdfIn PDF document text
    • http://xovijezup.mywebcommunity.org/52673568687.pdfIn PDF document text
    • http://9gusevshop.website/no_man_s_sky_xbox_one_update8jhsi.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/71875453559.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450723/normal_600a1369ba83b.pdfIn PDF document text
    • http://zonitupupafof.sportsontheweb.net/mn_dmv_drivers_test_questions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374364/normal_6024483442f87.pdfIn PDF document text
    • http://kersita.space/dragon_rampant_freeca018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444885/normal_5fd62402b1233.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417129/normal_5fc914b4373a1.pdfIn PDF document text
    • http://proita.space/rekogagodwqxqz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421048/normal_602937f71dde1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486523/normal_603fc2875db06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393370/normal_600fc3671f5f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371808/normal_60281b83d368a.pdfIn PDF document text
    • http://sutivetowit.mypressonline.com/15765908369.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/how_to_use_samsung_dishwasher_dw80r2031us.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pujusojup.epizy.com/blank_unit_circle_template.pdfIn PDF document text
    • http://fuvarijes.atwebpages.com/32078148185.pdfIn PDF document text
    • http://zegemipufe.epizy.com/wuniwuzirewewudog.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_off0000e9c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C5 5168 bytes
SHA-256: 1577d8e3bc155a06e8c698a536f17375f361e6e3799907ee861692e09e564e24
font_01_sfnt_off0000fb5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5A 10708 bytes
SHA-256: bc170b2003f544dc9d90742e53166f2f58e590b70391e3c286858c2373c4d2e5

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