Malicious PDF — malware analysis report

Static analysis result for SHA-256 97b0c6ea0ad7ba7d…

MALICIOUS

PDF

79.3 KB Created: 2021-03-15 07:30:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 038b77a2a55cb2a552780d6be2ccb3cc SHA-1: 6ffe301974746cb3caa70deaf242724b004ae690 SHA-256: 97b0c6ea0ad7ba7d597d2ffbe0169ad3264c5af90186a6780952c98786e81ab6
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to appear as legitimate documents. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=black+and+decker+firestorm+18v+drill+manual
    • https://cdn.sqhk.co/dewufidabo/kgeSgeP/63229478146.pdf
    • http://igoscandinavia.com/the_money_masters_1996_full_documentaryzyath.pdf
    • https://pazisurezufil.weebly.com/uploads/1/3/4/5/134594691/cd86ac1cdc.pdf
    • http://moscow-siberian-force.online/detofutanimipeduwabuduws8zx3.pdf
    • https://gabejudunutulan.weebly.com/uploads/1/3/4/8/134887900/3572127.pdf
    • http://mobile-media.moscow/how_to_catch_big_fish_in_ocarina_of_timebgwzv.pdf
    • https://cdn.sqhk.co/jojevirelo/WRegdij/5679360859.pdf
    • https://vutuwibomakupir.weebly.com/uploads/1/3/2/7/132740747/sevizumobovule.pdf
    • https://cdn.sqhk.co/xelajuwodaf/ISia6gh/vowazu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d04e8e30-cda0-4d26-9694-f2482d6feb15/24684788177.pdf
    • http://puzegekizizovin.epizy.com/aace_clinical_case_reports_author_guidelines.pdf
    • http://nitigij.rf.gd/mesevubolenubawegewasoli.pdf
    • http://bijexeb.rf.gd/rain_dial_sprinkler_key.pdf
    • https://uploads.strikinglycdn.com/files/b659dcdd-3d8a-44df-bd4b-ed50b4ead4ea/petedujufa.pdf
    • https://uploads.strikinglycdn.com/files/9ee11474-0e74-4ea1-ae4f-256060a758ec/weight_training_schedule.pdf
    • https://uploads.strikinglycdn.com/files/47e18e00-7d98-4522-babd-5e711b5f348e/51493282116.pdf
    • https://uploads.strikinglycdn.com/files/c54977c8-a2db-46e8-a9e2-3f9b3d1c2b4d/85450276645.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_off0000f54a.bin
279cbc6d017f8f1f87acbd8e4a49933d00271fd9d851416044ee0be2e25b56d0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF54A 5588 bytes
font_01_sfnt_off00010842.bin
12c866f65573b1854034712391fb95176b036e474368fcc5a3f655804822678f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10842 11540 bytes