Malicious PDF — malware analysis report

Static analysis result for SHA-256 b86a7e9859a91afd…

MALICIOUS

PDF

76.5 KB Created: 2021-01-06 06:43:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 05ed4d592afa97a50738196e3c58d1ec SHA-1: 17f60df8a95080c79c9e22304a88ef742d2f511a SHA-256: b86a7e9859a91afd680be491b06a15fab0f3f882af6782ee49d4c593b6f4dfe0
214 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, and contains links to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to workers' compensation forms, directing users to URLs such as 'https://traffmen.ru/aws?utm_term=workers+compensation+injury+report+form+california'. The presence of numerous embedded links suggests a phishing or scam attempt.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=workers+compensation+injury+report+form+california In PDF document text
    • https://cdn.sqhk.co/xixumobun/wJjhSjc/zilenejedawafa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420019/normal_5fc4876449c25.pdfIn PDF document text
    • https://vunozeguwogiwe.weebly.com/uploads/1/3/4/7/134745761/nuvavobutot_doraraleluseba.pdfIn PDF document text
    • https://rimozaruminipa.weebly.com/uploads/1/3/5/3/135391391/fukositufibon_vunefasowiteno_pakijiwel_ruzemikuvode.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386335/normal_5f8d57693617d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475716/normal_5fec7f1899038.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/961204c4-0b74-4a9c-b841-82f7e70bf86f/19686355410.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3231da1a-6dda-487c-b874-e43116c61897/siropum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/884bbe32-eeed-4614-a632-06f546cf08fa/kanger_subox_mini_starter_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08c94858-ee4c-4f81-9c04-97101c806ef3/fukavorudusomekipi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68d7c3fb-06ea-4a51-9fa9-da605b20dc08/math_is_math_meme_incredibles.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_off0000e067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE067 5300 bytes
SHA-256: 4069c2f3196bdc2b1c1b66612b37ceceaf868c5edf51550c7f0cbc1b98274cc7
font_01_sfnt_off0000f26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26E 10652 bytes
SHA-256: 1832de023eca9fcb602e4340aa8a9fb1c4842cf7128209e5e048daad10dd1d29
font_02_sfnt_off000116d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D5 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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