Malicious PDF — malware analysis report

Static analysis result for SHA-256 691e5dcf5ac2d4b8…

MALICIOUS

PDF

85.1 KB Created: 2020-11-25 03:51:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 61c2cdb56ff27fe936f553aac0fb6560 SHA-1: 0f11614957d1834b33b38715c375dfce7dd17187 SHA-256: 691e5dcf5ac2d4b8b96b975bb6ba16edac8ffc5cfd424c64879d8ad65c57f54d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a suspicious domain ('trafffe.ru') that is likely used for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search engine results or distribute content widely. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://trafffe.ru/123?utm_term=jordin+sparks+battlefield+audio PDF link annotation
    • https://gagumosesixibo.weebly.com/uploads/1/3/4/0/134018544/5934640.pdfIn PDF document text
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/gatazezizujebap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c879ec4a-2192-4a9c-b4a9-61c2a744a31a/attention_charlie_puth_mp3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/672e0183-0747-4bd2-b91b-92c80006f274/40693274301.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/96032662143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef306f8f-99dd-4df7-8b4c-b64d7dc82725/tatex.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/laxedagujoruwezigutusixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fb5acc4-870c-44c9-a131-be6e28bfdec6/madison_sd_google_maps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/953d46dc-f7f7-45b0-b5ce-6e7b9c137e2e/67259891855.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/ninja_mega_kitchen_system_bl773co_best_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a1dad05-6eb8-42c2-8107-e114d720848f/xitusevejiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6977d0d-73bf-458e-85d6-e0f9b170244b/98932770241.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/what_is_mega_in_scientific_notation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fe1106b-c06d-4546-8f83-a0d2c48ce0ea/kennedy_in_massachusetts_race.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B0 5112 bytes
SHA-256: 9e2d55c73b70d1cb57c242ef33a736f8880eb3d7849f39faffa2e4b9d4c4fba1
font_01_sfnt_off00011419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11419 11516 bytes
SHA-256: c0664dff8c293700f4f5e928ea3ad4e50c6e6f235b55790815801ec12c2811d6
font_02_sfnt_off00013951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13951 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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