Malicious PDF — malware analysis report

Static analysis result for SHA-256 4acb34ac9d695c7a…

MALICIOUS

PDF

67.6 KB Created: 2021-03-20 23:03:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5b006669651e0a6ddab516985f1e4309 SHA-1: 15887800f320c8fd339677faa824f688390d7362 SHA-256: 4acb34ac9d695c7af181256cce357f07be8f95819c02b01e3eb0279b1e5d96b7
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many pointing to disposable domains, which is characteristic of SEO link farming or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. The embedded links suggest an attempt to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9704

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://golowaki.ru/aws?utm_term=construction+lingo+for+dummies PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402721/normal_603312daea160.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495399/normal_5fdbbe82c9c66.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/5nAmkha/phantom_bomber_b17.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/vcwgg8H/disneyland_resort_express_route_map.pdfIn PDF document text
    • http://koponegigat.medianewsonline.com/what_are_the_highest_paying_jobs_in_information_technology.pdfIn PDF document text
    • https://mafivuvaga.weebly.com/uploads/1/3/5/3/135323118/6afe626.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/past_continuous_exercises_questions_and_answers.pdfIn PDF document text
    • http://xafomona.mypressonline.com/genetics_multiple_choice_questions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416139/normal_601b1d531bb4c.pdfIn PDF document text
    • https://xawizavikerid.weebly.com/uploads/1/3/4/5/134525990/e7e9fd01e3efb20.pdfIn PDF document text
    • https://cdn.sqhk.co/pevedapev/cji6ngc/hong_kong_minersville_phone_number.pdfIn PDF document text
    • http://mazanatur.space/kusadejazhtnku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418558/normal_6019b6e9f3cb0.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/basic_algebraic_geometry_2_shafarevich.pdfIn PDF document text
    • http://reform-st.ru/47933592900413io.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/9apbx13/84116494916.pdfIn PDF document text
    • https://tewafegode.weebly.com/uploads/1/3/5/3/135350941/guwif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC5 5036 bytes
SHA-256: a7f3f277c383e632b27bd842331720c9383e8083de3b82b370547b7505356c65

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