Malicious PDF — malware analysis report

Static analysis result for SHA-256 3df8a5f8c0a7878d…

MALICIOUS

PDF

68.3 KB Created: 2020-12-21 22:53:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d4b319e87181b8c186555b93fcaea837 SHA-1: 1bbc60bf045f8bfe2cb6c928c43ae3b04e92e986 SHA-256: 3df8a5f8c0a7878db93274e61b371a65b336997890c784689bde54baa6dbee16
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, with one prominent URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or traffic redirection. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit PDF viewers or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://traffine.ru/strik?utm_term=tumblr+quotes+about+love+of+your+life PDF link annotation
    • https://lanufuxag.weebly.com/uploads/1/3/0/9/130969896/370428.pdfIn PDF document text
    • https://nujetamewude.weebly.com/uploads/1/3/4/8/134881912/dunaro-diwijodag-voxaxedabo-rizolenigomo.pdfIn PDF document text
    • https://zukolipiniroti.weebly.com/uploads/1/3/4/4/134494738/kadiveli.pdfIn PDF document text
    • https://sibinepenisux.weebly.com/uploads/1/3/4/4/134467302/wovogab.pdfIn PDF document text
    • https://poxapoxidofex.weebly.com/uploads/1/3/4/0/134016688/dulekoda-pidawulan-rerufu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/tokit/body_language_by_joe_navarro.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/werubozatukibafud.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/fasinokelojilevegurawo.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/the_spark_of_life.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/college_acceptance_letter.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/xufifipulunez.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/lanoges.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a7ede9fc3622d52d662b/t/5fc526722dd96f5918932b7c/1606755954905/55338941149.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d4086b97992eb55bb7f9/t/5fc4f1264e98326c02ac3096/1606742311334/wigukowupa.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/dawajotej.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFFB 5292 bytes
SHA-256: 2b831bab0306d651dea352d884f341fa39a08cbe13e5627bee93813b185591a3
font_01_sfnt_off0000d1e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E8 6068 bytes
SHA-256: 58b4873d33ac9fffaf45ed1a2312b8eb5fadf3b067e77f8cfe9e87095f6a7717
font_02_sfnt_off0000e198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE198 9356 bytes
SHA-256: 003ee55efa3d994652a2f49be01d841009c79995c694f0461818154dbbfeb30e

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