Malicious PDF — malware analysis report

Static analysis result for SHA-256 d99306b67a005417…

MALICIOUS

PDF

76.7 KB Created: 2021-06-09 03:31:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1920e0214cccc192e88b5c69e59957b3 SHA-1: 431289656ef3d22e914be8d2af6a05335d71973b SHA-256: d99306b67a0054173538ea3cdf3904b4b07ce3bdb4de8ab31f664aacb5440cff
194 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or scam campaign, indicated by the presence of a large number of external links, many of which point to disposable hosting or redirectors. The primary URL, 'https://drafthe.ru/pbw?utm_term=licence+key+ccleaner+2020', suggests a lure related to software license keys. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/pbw?utm_term=licence+key+ccleaner+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374537/normal_6039b29eeddbd.pdfIn PDF document text
    • https://xugugizebe.weebly.com/uploads/1/3/1/4/131482894/2996522.pdfIn PDF document text
    • https://mowolonob.weebly.com/uploads/1/3/4/8/134874237/e08bf4.pdfIn PDF document text
    • https://weziriditovi.weebly.com/uploads/1/3/4/1/134108838/0f338909d6.pdfIn PDF document text
    • https://juvafize.weebly.com/uploads/1/3/7/5/137516136/7cdae130c.pdfIn PDF document text
    • https://faxigokoge.weebly.com/uploads/1/3/0/7/130775726/kidofakurag.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/tasomobinipebebe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423452/normal_60bdab0256605.pdfIn PDF document text
    • https://doxuginuf.weebly.com/uploads/1/3/5/3/135346615/dikatuminoxapabefe.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/247548bf-67b6-4ec6-ae7d-edf7a3e06a15/what_is_body_autonomy.pdfIn PDF document text
    • http://ziduzobif.pbworks.com/f/holt_physics_problem_2a_answers.pdfIn PDF document text
    • http://wezenibafasi.pbworks.com/w/file/fetch/144640296/why_work_in_private_banking.pdfIn PDF document text
    • http://sukagafamo.pbworks.com/w/file/fetch/144911535/6321700027.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f0b1bbd-55b2-415c-a236-5918fc7e0e01/what_disorder_does_the_man_in_split_have.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59a8f055-6cbb-4be3-bca7-5a02bc840b72/8611306779.pdfIn PDF document text
    • http://jijagenaneke.pbworks.com/f/58235929841.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce286bf1-68a8-4217-910e-70e8ce6a2b08/31494349646.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5048f5f2-e5d8-4f08-a37f-a3eaf8b4bc7d/area_formulas_for_shapes.pdfIn PDF document text
    • http://gemometis.pbworks.com/f/29935969019.pdfIn PDF document text
    • http://vowetegaperi.pbworks.com/w/file/fetch/144893454/17962750119.pdfIn PDF document text
    • http://xalanupuzewo.pbworks.com/w/file/fetch/144421581/93543761029.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_off0000f026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF026 4996 bytes
SHA-256: 85b3ec6be1de413bf1589571d9f70a0706b6e352ecfa8bd332d977bbdcf63ff8
font_01_sfnt_off00010146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10146 10664 bytes
SHA-256: 17125425b15c297155482e9d620857f48de6a5ac41bc2c584497e0199e5341a1