Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf2c29cb86465e6…

MALICIOUS

PDF

76.5 KB Created: 2021-04-02 10:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dd3b5a8f9a8f960c0dbeca107eaae645 SHA-1: e1a7222d6e363a5c5fded16a9aa3af8d9c64ad8c SHA-256: 1cf2c29cb86465e6368b4e95464f8e69507cb9c4d760f811f731c6191b459b96
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9992

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://jumiwimov.ru/strik?utm_term=12+greek+gods+and+goddesses+of+olympus PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393020/normal_6047724156fcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488323/normal_6055cbd686b8d.pdfIn PDF document text
    • http://midunetojonawiw.mywebcommunity.org/24126615005.pdfIn PDF document text
    • https://fiwisito.weebly.com/uploads/1/3/4/7/134715438/desesufenowejibep.pdfIn PDF document text
    • http://springwin.space/80068576712u1y8w.pdfIn PDF document text
    • http://ritual-venki.online/kogowisovipuzezofuronorue19b5.pdfIn PDF document text
    • http://mosomupusafebin.medianewsonline.com/vemitoxakudezuwatavaru.pdfIn PDF document text
    • https://sunarikibuniteg.weebly.com/uploads/1/3/1/3/131381519/4dedc.pdfIn PDF document text
    • http://thefortykuti.com/puzapagecxtfn.pdfIn PDF document text
    • http://psychologyrelax.xyz/jusikumowewipokizivigrp0fh.pdfIn PDF document text
    • https://xuwirebusupedun.weebly.com/uploads/1/3/4/3/134379604/powonuxevojonelen.pdfIn PDF document text
    • https://fuzobiwi.weebly.com/uploads/1/3/4/7/134717163/bisewibos.pdfIn PDF document text
    • http://lotibamuzuti.scienceontheweb.net/lifabosivesikafabip.pdfIn PDF document text
    • https://gufogejerujog.weebly.com/uploads/1/3/1/4/131406717/566cfc8f6d5f5f.pdfIn PDF document text
    • http://safetymirrors.xyz/how_to_use_headphones_with_cisco_phone_by_web1bafa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476938/normal_5fd1e1c2479a0.pdfIn PDF document text
    • http://ottics.ru/dream_daddy_mat_date_answersi6ka6.pdfIn PDF document text
    • http://henrysavbr.site/44070550426zebzc.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/ecc79eb6-da32-4be3-b493-8704da7c9e17/jakexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b61c64e-4c61-4b00-9316-14eee8d0d9fc/83350892602.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a9f7ecb-625a-4508-8aea-d0941d2603ac/49950442298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41dacd9a-edce-4c14-b737-1ad18bdb1c6d/56372922621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02305e16-10ab-4e12-9d4d-3790ecd164ca/fozutufapolodaruvuxu.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_off0000ee8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8E 5616 bytes
SHA-256: 6a7962f288333086a6d7cbac308ae190c18bb3bd4bdb2e9a051e1fa33aff1671
font_01_sfnt_off000101b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B0 10148 bytes
SHA-256: da02fc96a9109fcc543dbb08db39ca1f36e1b7d1a271b7680776728a7349863d

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