Malicious PDF — malware analysis report

Static analysis result for SHA-256 51d25dd065bbb116…

MALICIOUS

PDF

84.5 KB Created: 2021-02-22 21:08:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ef7214905d0d949a3e2694a60afc85c9 SHA-1: 9bfca51a45e6df7d4364109cce501ff78320550d SHA-256: 51d25dd065bbb116fa8a6fa62d83d0bce195ddc3d9dc0baa239b86fd778643e4
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 0.9998

Heuristics 5

  • 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 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://druttle.ru/123?utm_term=tissot+t-touch+expert+titanium+watch PDF link annotation
    • http://tuloxixanarurid.22web.org/lufodax.pdfIn PDF document text
    • http://pubomoxagu.22web.org/65832818617.pdfIn PDF document text
    • http://jogubewuzamofet.iblogger.org/minecraft_bedrock_edition_1._14_pc.pdfIn PDF document text
    • https://moxeguzivega.weebly.com/uploads/1/3/5/9/135965209/84ec69ec2.pdfIn PDF document text
    • http://manaluw.iblogger.org/nazakamelubozov.pdfIn PDF document text
    • https://tefufujilidawa.weebly.com/uploads/1/3/4/5/134578337/efb06d4366f.pdfIn PDF document text
    • https://demuxovepeb.weebly.com/uploads/1/3/4/3/134311881/datijal-wojuponutase-valexetorer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417023/normal_601b91bc7d431.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376105/normal_5fe36cbf8bd2e.pdfIn PDF document text
    • http://zozegakipuvi.iblogger.org/guru99_manual_testing_agile_methodology.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jovekus/91956698008.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/nufidi.pdfIn PDF document text
    • http://lijukogibedatu.epizy.com/86947360556.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/45331732509.pdfIn PDF document text
    • http://pavipalu.epizy.com/23682067026.pdfIn PDF document text
    • http://muxuzuvom.epizy.com/ninezo.pdfIn PDF document text
    • http://guvenup.epizy.com/18305519106.pdfIn PDF document text
    • http://bifameb.rf.gd/what_is_handcrafted_espresso_beverage_at_starbucks.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_off00010faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAA 5284 bytes
SHA-256: fa262a48aed9684062d68fa06ee14b6170c314b602d45654f840d0fb2e074209
font_01_sfnt_off00012190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12190 10180 bytes
SHA-256: ade9dbb44728f2ea487d593d52b6aa575836a6eb1550f044d923429eeb35ebc0

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