Malicious PDF — malware analysis report

Static analysis result for SHA-256 d53b71a3a2c00315…

MALICIOUS

PDF

75.5 KB Created: 2021-03-20 10:48:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3ac9baf4ea7a81504440fcd611e8ef59 SHA-1: 5947c64e2b0dba668a272816cc4ed75a6f794aba SHA-256: d53b71a3a2c00315e261919f5cd11f4d13aa37494702ae487e440e98c049c568
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, with ClamAV identifying it as a phishing trojan. The embedded URLs point to disposable hosting and potentially malicious content, consistent with phishing or SEO spam tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://soxebez.ru/wix?keyword=step+2+naturally+playful+woodland+climber PDF link annotation
    • https://venozosuvizulul.weebly.com/uploads/1/3/0/8/130814909/jemesuxumutopiwuk.pdfIn PDF document text
    • https://cdn.sqhk.co/lexijunibul/dibgjis/lenovo_warranty_support_australia.pdfIn PDF document text
    • https://parikijofema.weebly.com/uploads/1/3/1/3/131383717/e2ead9d784e.pdfIn PDF document text
    • http://goossyy.online/tipo_de_bombas_centrifugasb4til.pdfIn PDF document text
    • https://cdn.sqhk.co/butuxolevu/jBtuVka/7728309445.pdfIn PDF document text
    • https://pefobasor.weebly.com/uploads/1/3/4/1/134131397/pekas.pdfIn PDF document text
    • http://bnl-jobs.com/nesolu2ozfw.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxofabope/ig9Igj7/minecraft_chernobyl_map_1._7._10_download.pdfIn PDF document text
    • http://my-favshopc.online/finoxgbvcv.pdfIn PDF document text
    • https://cdn.sqhk.co/tefazaturar/aesvvca/fast_food_mod_for_minecraft_pe.pdfIn PDF document text
    • https://wipasokewuwil.weebly.com/uploads/1/3/4/0/134000036/titomodokimado_mezabi.pdfIn PDF document text
    • http://supportcopyright.net/6637401073619z7t.pdfIn PDF document text
    • https://milelujip.weebly.com/uploads/1/3/4/8/134861654/nonogoluvavofe.pdfIn PDF document text
    • http://flash-sar.online/asking_questions_about_cultural_anthropology_2nd_edition_ebook97uvu.pdfIn PDF document text
    • http://bred-enligne.com/sejowugmlm1.pdfIn PDF document text
    • https://votujejigep.weebly.com/uploads/1/3/1/3/131380583/zevepadov_sisuput_nujanixojibos.pdfIn PDF document text
    • http://peludofnor.fun/heat-n-glo_parts_thermocouple8chn1.pdfIn PDF document text
    • http://mazafaka69pussy.online/76298800418l66ai.pdfIn PDF document text
    • https://nefatalij.weebly.com/uploads/1/3/2/7/132740339/lapitus.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovipawe/8hgBhbY/pusevulowega.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e5a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A5 5692 bytes
SHA-256: 531f685ba2e48faab5f0db4ddb895c4e5ed3f27d45cdf4c592a07c533d6cccf5
font_01_sfnt_off0000f90e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90E 11000 bytes
SHA-256: 94af4d69379d3b3acaa88bb853df652635ddde89bdc7c88f11b9f21aab795dcf

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