Malicious PDF — malware analysis report

Static analysis result for SHA-256 faab4416c926a607…

MALICIOUS

PDF

46.0 KB Created: 2020-11-06 04:13:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3d216459c165bd80f5559cbb57e9a6b4 SHA-1: d5183fab2afdff2ee8fb7a7d3ce596a6d601f05b SHA-256: faab4416c926a60737e6346dab8204515ae6af8e9de31ad4716042d8c2638909
96 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to PDF files with numeric or generic slugs, suggesting a link farm or SEO manipulation tactic. The primary URL, https://trafficel.ru/strik?keyword=manual+for+doss+soundbox+bluetooth+speaker, is presented as a manual for a speaker, likely a lure to drive traffic to a malicious site. The ML classifier strongly flagged this PDF as malicious, and the presence of many external links supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trafficel.ru/strik?keyword=manual+for+doss+soundbox+bluetooth+speaker PDF link annotation
    • https://zufikuwokuz.weebly.com/uploads/1/3/4/5/134522796/tefapanelep.pdfIn PDF document text
    • https://wokozizexufam.weebly.com/uploads/1/3/4/2/134234926/jeborujiwitukipekab.pdfIn PDF document text
    • https://jamitugila.weebly.com/uploads/1/3/4/0/134012499/gitopar_newegixeti_mixuvavabeluz.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/8948482.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b44598c-5978-4e08-b421-033742cce90c/kakajopemadugenofima.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/download_vlc_player_android_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05f89cd2-69d1-4a58-95e7-a812c54c5cad/raison_et_sentiments.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77458a56-5135-4c2b-ab25-be7ed74c6ea0/65534631567.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d90fcb04-9524-42a6-aef0-63e32e16a374/1999_jeep_grand_cherokee_parts_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4972e08-491c-4752-a677-62d27721f68b/how_to_hack_slope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a580cd1-6f01-4af9-9eb0-6d2b68c029a1/75874443906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b619fee-8988-4773-92ab-92917b4532e1/nitevotetibozapojer.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/96186617406.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeb835c1-fab2-464a-aee4-ab013ea39850/69771656096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44ae900e-e84c-4c1a-85a9-dfc6629190dd/77133284907.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000741c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x741C 5404 bytes
SHA-256: caf80417695ab4f0fa355cd19e6511edc74898cb02ab572505d40054d6a176eb
font_01_sfnt_off00008680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8680 10720 bytes
SHA-256: 74b3f9015ae0fffed1c4defbc105ae21ae3f21a546b0a6b965558fa2e86fb7ad

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