Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e52d52f7072c0e8…

MALICIOUS

PDF

70.2 KB Created: 2020-11-25 00:31:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 60fd5d5eb54790a926e00aeffe05e348 SHA-1: 27daa84b075222510c27ae4df23342eb345a37ff SHA-256: 8e52d52f7072c0e8f5abba8954607db76f96ceff28227225c2b8458e06ff0953
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 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://traffine.ru/aws?utm_term=christian+movies+free++in+tamil PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377401/normal_5fb02915db86f.pdfIn PDF document text
    • https://tebefatudu.weebly.com/uploads/1/3/4/3/134329870/2146136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416501/normal_5fae1ce6892f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485448/normal_5fbb4b32cd9c3.pdfIn PDF document text
    • https://sazadasixitabe.weebly.com/uploads/1/3/4/4/134404720/453710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370278/normal_5fb88dc2bc4bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388617/normal_5f964a6004097.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/kovebofu.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lulodegoner.pdfIn PDF document text
    • https://zomujowedava.weebly.com/uploads/1/3/4/6/134629266/8789442.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388283/normal_5f8d2839460bf.pdfIn PDF document text
    • https://fepuluji.weebly.com/uploads/1/3/4/8/134871890/xewata.pdfIn PDF document text
    • https://rewazute.weebly.com/uploads/1/3/4/6/134648352/f6232.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/medetopuwofetut/my_hero_academia_episode_10_subbed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecd22004-3f64-4ab8-bd38-e80df4a9837a/59935906262.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/confirmation_receipt_for_payment_made.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_off0000d61c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61C 4972 bytes
SHA-256: 659e6bf1587a9cd41fbfbe96c82125441a414835dbfe5e33e6d584f3cb81fd80
font_01_sfnt_off0000e6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D7 11268 bytes
SHA-256: 4ae4c27814f3501889abdb24204676065f9379f6292945ae79867ba59583daa9