Malicious PDF — malware analysis report

Static analysis result for SHA-256 c67819a971a51c1a…

MALICIOUS

PDF

76.3 KB Created: 2021-04-05 14:38:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 260d384dc71d0e291e30baaaa8037d6b SHA-1: 11937afd3076a46fd5107635d4bec54513d5b58b SHA-256: c67819a971a51c1a6a940bfa119f90442c944bf35cf6b4743282d51493b368a5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/wix?keyword=hobo+2+unblocked+games PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453142/normal_5fe4bfa7aabdd.pdfIn PDF document text
    • http://dokojusekorukuf.iblogger.org/how_to_get_fox_sports_midwest_on_dish_network.pdfIn PDF document text
    • http://dimax-matrasy.ru/59636263342o92mv.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423145/normal_60285912b5dac.pdfIn PDF document text
    • http://inertbhjbj.ru/tensor_calculus_vs_vector_calculusncrft.pdfIn PDF document text
    • http://dujerewogirovok.22web.org/kafoxowa.pdfIn PDF document text
    • http://leafester.online/cognitive_behavioral_therapy_for_anxiety_online99fr6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383923/normal_5fdd45a5053ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370068/normal_600c75b35dada.pdfIn PDF document text
    • http://sodaapp.club/660561237241yjbz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://minuvuri.epizy.com/mujigetuxepavibidapo.pdfIn PDF document text
    • http://gasukexopesifu.epizy.com/10084492819.pdfIn PDF document text
    • https://acfc0e76-311d-46af-9c13-f46c112eb424.filesusr.com/ugd/f90bad_7052baff51b14afaae62aedfeffa3776.pdf?index=trueIn PDF document text
    • http://jalofepo.rf.gd/an_apology_for_poetry_essay.pdfIn PDF document text
    • https://0ef2f354-78a3-4528-990c-72f69c86fc6a.filesusr.com/ugd/6a0da6_0bf81d9e204445168d879307b09098e3.pdf?index=trueIn PDF document text
    • http://zanulewetadom.epizy.com/canzoni_napoletane_accordi.pdfIn PDF document text
    • http://vuremekewema.rf.gd/laresowaboziwawipimumofig.pdfIn PDF document text
    • http://giwofigu.epizy.com/a_separate_peace_worksheets.pdfIn PDF document text
    • http://supetok.rf.gd/vososujobodonujubegafaro.pdfIn PDF document text
    • http://zubeleboju.epizy.com/35359920204.pdfIn PDF document text
    • http://bowafiwefugi.epizy.com/widubobigunaxate.pdfIn PDF document text
    • http://dapolejalufimi.rf.gd/spring_jmstemplate_message_selector_example.pdfIn PDF document text
    • http://tatoguninorevem.epizy.com/22051792301.pdfIn PDF document text
    • http://dikumetuvo.epizy.com/alpine_cde-133bt_not_pairing_with_iphone.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5B 5460 bytes
SHA-256: 149cb6babf60c743d9b3025cbde933069a9cb0ed53e707e670fda69fd4bff4fe
font_01_sfnt_off0000fcdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDF 11356 bytes
SHA-256: 1233a97f14704c61d47eda33a1ab3328f53a280443ebb9534cb8209ec8e72e1c

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