Malicious PDF — malware analysis report

Static analysis result for SHA-256 269ff4e48f35b34b…

MALICIOUS

PDF

76.8 KB Created: 2021-03-31 23:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a525e0eb5f350271588e250941c434b9 SHA-1: 3549fbc2cd819efc3b7bfdab415ff36746459008 SHA-256: 269ff4e48f35b34bf5d56141dec587c1138b38f830a48168ad47484eac408307
156 Risk Score

Malware Insights

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

The PDF contains a mass of 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 malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/wix?keyword=f4x+workout+pdf
    • https://tuzafezinaxav.weebly.com/uploads/1/3/4/3/134319976/janewovenomi.pdf
    • https://fuwupizur.weebly.com/uploads/1/3/5/3/135390256/rorujugemofes-godulowame-dowudokaloxomu.pdf
    • https://buwolipirawelas.weebly.com/uploads/1/3/0/8/130874522/wilogigugopo.pdf
    • https://suwudaxodorepe.weebly.com/uploads/1/3/4/8/134885248/javosutuduwi.pdf
    • https://juvezunadu.weebly.com/uploads/1/3/5/3/135306862/6b4ab9e7.pdf
    • https://tugufotekaluxaz.weebly.com/uploads/1/3/4/8/134883762/0691d237.pdf
    • https://weduparazibad.weebly.com/uploads/1/3/4/7/134710999/8188325.pdf
    • https://sumiloruxefeme.weebly.com/uploads/1/3/2/8/132814276/7289076.pdf
    • https://pipalilivo.weebly.com/uploads/1/3/4/3/134310902/wisinodafixas_mekike_jesasimis.pdf
    • https://jupikojeba.weebly.com/uploads/1/3/0/9/130968920/bavanuku.pdf
    • https://luvisusarav.weebly.com/uploads/1/3/6/0/136011852/budubatukabamebilo.pdf
    • https://susatabunek.weebly.com/uploads/1/3/2/6/132695662/63f0ff7c.pdf
    • https://vovowiki.weebly.com/uploads/1/3/2/3/132303124/semef_vopenofisemo_dofujuku.pdf
    • https://dabamupusoga.weebly.com/uploads/1/3/4/2/134265366/siwerowoja.pdf
    • https://bojewozawix.weebly.com/uploads/1/3/4/3/134321988/286b519063e91e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4a18af25-77b9-43d6-a7b3-6535107c2c4a/things_to_avoid_in_summary_writing.pdf
    • https://uploads.strikinglycdn.com/files/8fd49200-a8a4-40d4-ab84-0e9f782fcfb1/focusrite_scarlett_2i2_vs_4i4.pdf
    • http://nalakakowim.epizy.com/mutirimakitezo.pdf
    • https://uploads.strikinglycdn.com/files/8eec6353-b65c-4faa-986d-f5673309e870/53155304833.pdf
    • https://uploads.strikinglycdn.com/files/cb76161c-40cb-4740-9ba8-fedfd46fddc1/how_much_do_fire_suppression_systems_cost.pdf
    • http://nuvadonopuxopu.rf.gd/5133958247.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed13.bin
dc627c26b78f9eced4dcfcad654acb65e60bf4f5ec1fdfd3821aec06025e6ec8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED13 4884 bytes
font_01_sfnt_off0000fde2.bin
39598cae12ed82305a67e141504309dc2f6b980c06a465ca6e97e6b4c53fb926		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE2 11264 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.