Malicious PDF — malware analysis report

Static analysis result for SHA-256 62cdc7fdfc8f1e0f…

MALICIOUS

PDF

62.7 KB Created: 2021-03-09 00:33:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2a90702f8a6a319b09c814e16b61a7b1 SHA-1: 1f2e0249c79373f56907aa387c203028eac626b3 SHA-256: 62cdc7fdfc8f1e0fadaf1c57d6b79268b0238637cdff736e4b6f8d080394f19b
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content or phish for credentials. The ClamAV detection and ML classifier further indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and external link farm heuristic suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7624

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.
  • 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
  • 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=zkteco+access+control+manual+pdf PDF link annotation
    • http://navevukosuso.mypressonline.com/33421728533.pdfIn PDF document text
    • https://cdn.sqhk.co/sizafutito/chfmf1a/depuvudikogogebarubijene.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/jiT3Cnv/35141615786.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426697/normal_6007445101489.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/KhnigVz/gibubaropexe.pdfIn PDF document text
    • https://cdn.sqhk.co/rifelefiw/ThdhfaB/e_coli_kidney_infection_baby.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368265/normal_6042511f281ae.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/10238472713.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e769ba2-5a2d-40d5-a924-302ed9f0b9af/how_to_repair_petsafe_collar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97184827-930d-4c1a-aab2-8d1467c658b3/numezijuvukasof.pdfIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_ce2554e1c8524ed5ab71848c7bb10a00.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e008470-794e-48e3-b2db-421cfe96cd3d/lorobeworuxuxaw.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/83827399326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a910f4c-1e68-4c1d-9baa-5f5315f23a61/computer_architecture_and_organization_an_integrated_approach.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f2902dc-7566-4c6f-bb0e-c9bc2d9ff149/shakespeare_sonnets_with_explanation.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/simple_past_tense_regular_and_irregular_verbs_quiz.pdfIn PDF document text
    • https://d9c73feb-c945-4d97-9d44-ff62a4b57c47.filesusr.com/ugd/12056e_6aec773ad08348098823dcbdb3b07f1d.pdf?index=trueIn PDF document text
    • https://4a0f17ac-6ce6-4c05-9546-25c48d39d9f7.filesusr.com/ugd/cd79e3_065784c8ee0e4c29bd376304cdf2cc93.pdf?index=trueIn PDF document text

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