Malicious PDF — malware analysis report

Static analysis result for SHA-256 65cec8f0d4cfe35b…

MALICIOUS

PDF

70.7 KB Created: 2021-03-17 16:03:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 83abca6c09e9913d645d5e337c79e936 SHA-1: 1198930f0477bff504507848ae9735edce9cd628 SHA-256: 65cec8f0d4cfe35b19e862d2aca9344cb92e7f1343c5f91f086b500a609fa01f
186 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 0.9996

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://resalured.ru/123?utm_term=imovie+trailer+storyboard+templates PDF link annotation
    • https://cdn.sqhk.co/xubuguxovim/OrghhdO/79770368069.pdfIn PDF document text
    • https://cdn.sqhk.co/tavanaru/XjdqZhg/gumozeba.pdfIn PDF document text
    • https://cdn.sqhk.co/zitajazasu/ijrjeji/merge_robots_clicker_idle_tycoon_game_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vofonowul/FjcogdW/knock_down_lyrics_alesha_dixon.pdfIn PDF document text
    • http://lazebusotidedof.22web.org/landscape_ecology_forman.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449001/normal_60245c85bca17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404290/normal_6022bb1c829ca.pdfIn PDF document text
    • https://cdn.sqhk.co/widafopaj/jeAqeo7/durizuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3792f6bf-2247-4239-a8b6-4d4492389b24/how_to_improve_memory_psychology_today.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/65881496802.pdfIn PDF document text
    • https://5d9de69b-f80b-44d6-9c2d-9027806fef0b.filesusr.com/ugd/e26ad2_55e0d826967e40c7b7e8d90e8ed14a82.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/56823965806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/077eb4e9-63de-4058-b19a-5fd62a54896d/gexegugolevalijetexeka.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/cover_letter_for_cv_sample.pdfIn PDF document text
    • https://e1cd7dcf-8988-4be8-9b1a-722367337987.filesusr.com/ugd/6203b9_48b33c080a654de19dc779d34e50bfa0.pdf?index=trueIn PDF document text
    • http://rumavajusugeg.rf.gd/17562194181.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/56173976899.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47ce0a8a-339d-4a69-b61d-e065263f0472/demovewixikaruwijus.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_off0000d884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD884 5344 bytes
SHA-256: 86f09a857a358bbda8940d25a3503e2f0d27656eb6efb62b3a36d3a2ea0879fd
font_01_sfnt_off0000ea99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA99 10264 bytes
SHA-256: 2d70af00b41519db58cd646a187fce5772db1334541f78663df14f5561b9131f

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