Malicious PDF — malware analysis report

Static analysis result for SHA-256 17d1b5e491609976…

MALICIOUS

PDF

91.6 KB Created: 2021-01-01 02:30:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5dac0781821f4fafe9f939ad6b57cd9a SHA-1: 7dbabceab8495163a27fabe48108256f36410164 SHA-256: 17d1b5e491609976118874d39c09c005d52fb681c66ed3c2811c2674f801f458
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=smash+burgers+nelson+menu PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369797/normal_5f907ae62d8d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371267/normal_5f8b476c9910b.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuvedije/hcsRih8/c64_emulator_games_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/walumupo/mhdhdJR/baby_jogger_stroller_city_mini_gt.pdfIn PDF document text
    • https://cdn.sqhk.co/xowuzaseku/cgidhbF/balloon_slingshot_diy.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/jaidhb6/56200569808.pdfIn PDF document text
    • https://cdn.sqhk.co/bidomutarili/aIgjuhi/dejodoxogulin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375518/normal_5f98f075aa299.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451750/normal_5faf85f26d6f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366316/normal_5f979e00237b5.pdfIn PDF document text
    • https://gesimuto.weebly.com/uploads/1/3/4/6/134685476/4929712.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461767/normal_5fdd7fbd8ec40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381531/normal_5fb2c1e970a47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446499/normal_5fa2a688d69f3.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
    • 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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11991 5096 bytes
SHA-256: 5f51a414533797b5803bfd060dd358415e90d75f97a641a1357cb30473db418a
font_01_sfnt_off00012aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA9 12644 bytes
SHA-256: 3bf8cc1fcea98b7073304540d4cf1b948053c19c538b6aaec59f8f6bf453889b
font_02_sfnt_off00015326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15326 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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