Malicious PDF — malware analysis report

Static analysis result for SHA-256 92058d3a87d5fadd…

MALICIOUS

PDF

88.5 KB Created: 2021-01-17 13:08:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 599d13772f51ee1c37b0a2149745e886 SHA-1: 12b22f86851fbd80ebc2963994146b4847754bdd SHA-256: 92058d3a87d5fadd6c37f04ca4d0cc8536225de1426da990fa1d1999027a9948
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The document contains a large number of external links, forming a link farm, with one prominent URL pointing to a potentially malicious domain. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document's primary purpose is to redirect users to other malicious or SEO-manipulated content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/123?utm_term=mortal+kombat+sonya+blade+movie PDF link annotation
    • https://wosobariwosamu.weebly.com/uploads/1/3/4/3/134372044/8000464.pdfIn PDF document text
    • https://fuvapevamasazu.weebly.com/uploads/1/3/4/5/134507747/e3802f3faff6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413122/normal_5feeda306f3bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496013/normal_5fcc53f9ea23a.pdfIn PDF document text
    • https://vabiwedewu.weebly.com/uploads/1/3/0/8/130813601/8555556.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454426/normal_5fbd438c9593c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386076/normal_5fde0344c2ead.pdfIn PDF document text
    • https://site-1173608.mozfiles.com/files/1173608/nissan_gtr_wallpaper_4k_android.pdfIn PDF document text
    • https://site-1175762.mozfiles.com/files/1175762/soar_plasma_trickshot_course_code.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427821/normal_5fce48846cd90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386349/normal_5fa5c19124803.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370071/normal_5fce802f3a5e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444644/normal_5fc39b627c008.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402507/normal_5f937c6ae87e4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pidosowot.epizy.com/total_coliform_bacteria_definition.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_off00011b4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4E 5344 bytes
SHA-256: 86c30f04a66534dcd31a2a20ac6c64efcc3c48bc65eb11b6467157594fd585d4
font_01_sfnt_off00012d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D73 11848 bytes
SHA-256: 1ca2a92d9c8c676bc396784ffb2a2340a25998471987743d9e00a5f023362452

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