Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd4fcbf51b947de9…

MALICIOUS

PDF

67.5 KB Created: 2021-02-11 21:55:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 21b4b9455e9ee020c0cc494ee4dcfcfc SHA-1: 50ac2e49194b2d4c294a5c6125f7eba1dfae2552 SHA-256: fd4fcbf51b947de9ed8d881f332612425a5fa388c118ffef0cbf5fff54194ad8
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs pointing to other PDF files hosted on disposable domains. The primary purpose appears to be SEO manipulation or the distribution of further malicious content, as evidenced by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=millennium+falcon+cockpit+green+screen PDF link annotation
    • https://dopovubejaxow.weebly.com/uploads/1/3/4/0/134017692/lazile_bapaxitaredise_bavefuradupes.pdfIn PDF document text
    • https://zekilunadaxidub.weebly.com/uploads/1/3/4/6/134631079/kobetetafomovi.pdfIn PDF document text
    • https://lewuseloti.weebly.com/uploads/1/3/1/4/131437615/bigikununasobazi.pdfIn PDF document text
    • https://tujezagen.weebly.com/uploads/1/3/4/7/134775207/c73b30ba857.pdfIn PDF document text
    • https://xesapexoxes.weebly.com/uploads/1/3/4/6/134633169/7214528.pdfIn PDF document text
    • http://lngcliente.com/firuwefapatiuzgxk.pdfIn PDF document text
    • https://vuguzakinizole.weebly.com/uploads/1/3/4/4/134493236/gekufefi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472768/normal_5fc7e70497b8e.pdfIn PDF document text
    • https://resivoviwogo.weebly.com/uploads/1/3/3/9/133987135/7ff65c86dcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447253/normal_5fd370ebccdb5.pdfIn PDF document text
    • https://deluwibenarut.weebly.com/uploads/1/3/1/3/131382693/785653.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489716/normal_600aad6446eb9.pdfIn PDF document text
    • https://wedemewimobuxet.weebly.com/uploads/1/3/4/3/134309086/dezefeviwap-tujuxisotime-ramivanetiren-lazukujupupeb.pdfIn PDF document text
    • http://pubggaming.online/lulagizp4zjt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390659/normal_6011ac30c7e12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455907/normal_5feb4dc37f275.pdfIn PDF document text
    • http://experiment.website/75163307109yscjm.pdfIn PDF document text
    • https://xafusotegemuwif.weebly.com/uploads/1/3/5/3/135304795/kotajifuke-giwug-dojenerolanu.pdfIn PDF document text
    • https://butevexonukuzi.weebly.com/uploads/1/3/2/6/132681970/kajuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFC 5404 bytes
SHA-256: 076b20d6c58e75ae630b99f5e68bea4bc5b5627e0d7860299ccbe12c844ebde7
font_01_sfnt_off0000dd5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5C 10328 bytes
SHA-256: 102128abf0505d552ed1e7840ce31d31fc7acc58237f07d7a8c0e252c5c637bf

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