Malicious PDF — malware analysis report

Static analysis result for SHA-256 2262a0318700aece…

MALICIOUS

PDF

74.9 KB Created: 2021-02-10 00:22:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: e6c8b4bba3eef6c3f1a1d58fdf120deb SHA-1: 6b00a93245b5426a70ecaf69509cf4c852fe7840 SHA-256: 2262a0318700aecef560f7a0000f3d34e9785b3730635a39fc2eefbde9d47527
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links pointing to various domains, many of which appear to be disposable. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious payloads. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://jacksth.ru/aws?utm_term=lagu+1234+i+love+you PDF link annotation
    • http://milanomodaitaly.site/87490367727zhjhm.pdfIn PDF document text
    • https://noparerekum.weebly.com/uploads/1/3/4/6/134639333/437353.pdfIn PDF document text
    • https://loxoxonejuk.weebly.com/uploads/1/3/4/6/134684666/vomijirizabul.pdfIn PDF document text
    • http://yblda.fun/66863809392jpthg.pdfIn PDF document text
    • https://cdn.sqhk.co/pemanunid/Zibrfhe/34713361567.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/iJShfhv/world_cup_qualifiers_schedule_europe.pdfIn PDF document text
    • https://federadedeladol.weebly.com/uploads/1/3/4/6/134626130/a933c937ab8b22f.pdfIn PDF document text
    • http://edarudost.online/57599635587vdm7f.pdfIn PDF document text
    • https://cdn.sqhk.co/manuguwe/4hdaidW/1knuddelz_code_for_penguin_simulator_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/egghjKh/13721548073.pdfIn PDF document text
    • https://tizelizenofus.weebly.com/uploads/1/3/0/7/130740364/17315b4d0a.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivunet/hgc9ijA/greatest_hits_of_the_90s_mp3_download.pdfIn PDF document text
    • https://cdn.sqhk.co/karadirimose/YUMahax/gmail_sign_out_of_account.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lidufaz.epizy.com/bexifaza.pdfIn PDF document text
    • http://pasigajixivete.epizy.com/2506971456.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d12f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD12F 5116 bytes
SHA-256: 8dd5c8ed1ed309705f2520f4843d0d725bc942d917b88aa0740f3c83a86dd28c
font_01_sfnt_off0000e2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D3 11316 bytes
SHA-256: 73a24b4e1a0b8b54c7613b7be75b53967e4e1888bb8b8bcf38c50ecf32696346
font_02_sfnt_off00010813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10813 16160 bytes
SHA-256: 71fec8a3adfe41455811528c654ef740a0d97889ddd19e39e153b04b7507b7f0

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