Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e8b758852546302…

MALICIOUS

PDF

75.0 KB Created: 2021-06-07 19:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: da8fe75c8fbf82c0905d9f43d8932301 SHA-1: 5429fcb544ca3ddc206f2f988b14d88ff3114bc9 SHA-256: 5e8b758852546302328bd0c6cc072ba6aa3bd525d75995aa94b39eed1105d08b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains text related to movie downloads, which is likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://catamma.ru/pbw?utm_term=tamil+new+movies+free+download+websites PDF link annotation
    • https://nepuvaduwixoki.weebly.com/uploads/1/3/4/5/134525355/vufadidotowomapugub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406514/normal_60322abd0a272.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4367922/normal_60b6f0e1cc76c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470968/normal_603f1e8880b87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420468/normal_6063b902d73fc.pdfIn PDF document text
    • https://zopewurexolo.weebly.com/uploads/1/3/4/5/134519391/6514937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445869/normal_60381699c2007.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424630/normal_605279efb01e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471252/normal_60274abf2f496.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472501/normal_60048f3f18767.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373516/normal_5ffd20e6a6819.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371791/normal_5fe2499b583fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372383/normal_603380f3e84c1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://viluxese.pbworks.com/f/rovokutonuzog.pdfIn PDF document text
    • http://mizunebapod.pbworks.com/w/file/fetch/144720024/hack_ngc_rng_online_cho_java.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18d48895-ccd6-46a5-8af8-2bebd2d329b0/foodsaver_v3825_troubleshooting.pdfIn PDF document text
    • http://pesivop.pbworks.com/f/78642266629.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39f2fef4-e93d-4d50-bfa3-bf18dfd0697d/themes_in_act_4_scene_1_romeo_and_juliet.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E1 5296 bytes
SHA-256: f492c883a0eb22f584f904d1711d8ea17fb3c01143a88234bbedfe44eecfd0f5
font_01_sfnt_off0000f9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E2 11264 bytes
SHA-256: d7046e9909ffa6dd49b4f0460722b283983d945e7f085293dd2f825f835a6408

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