Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7650557acd074b…

MALICIOUS

PDF

75.8 KB Created: 2021-02-23 19:04:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d9fc9f04428f2fefd7e3e71207b831fb SHA-1: 60eba0a120a729b98e2482778e5b3ec59dc90429 SHA-256: 9d7650557acd074b9f4ea473a5356c98ce8084601e3ca1f437aed0a93c8b3668
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://jacksth.ru/123?utm_term=when+can+baby+use+graco+swing PDF link annotation
    • https://kakituku.weebly.com/uploads/1/3/4/5/134589995/8522563.pdfIn PDF document text
    • https://jonokiruvonanum.weebly.com/uploads/1/3/5/3/135319333/kemolirizuje.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448549/normal_5ffdac3498c59.pdfIn PDF document text
    • http://dasuwupozu.22web.org/56917389126.pdfIn PDF document text
    • http://de-bewertung-id-q2e5t23.top/99295556572u88a9.pdfIn PDF document text
    • http://getsalle.xyz/aps_pay_daystaz1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373008/normal_5fd2702a6d4b1.pdfIn PDF document text
    • https://sagojuxejuzogug.weebly.com/uploads/1/3/4/5/134598596/7303996.pdfIn PDF document text
    • https://vewejefimubi.weebly.com/uploads/1/3/4/1/134108794/xepigibizog_xijijupinune_nuzila.pdfIn PDF document text
    • http://899themes-demo.ru/affine_transform_python_3dki6x4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mesitineka.rf.gd/12529605260.pdfIn PDF document text
    • http://bokipivumuripo.rf.gd/jolepu.pdfIn PDF document text
    • http://kiwusumusi.rf.gd/artex_elt_110-_4_installation_manual.pdfIn PDF document text
    • http://xofududegotu.epizy.com/24367537085.pdfIn PDF document text
    • http://difugarulid.epizy.com/uefa_champions_league_2006_pc_game.pdfIn PDF document text
    • http://suvowafavij.epizy.com/tombstone_arizona_travel_guide.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_off0000ebc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC1 5376 bytes
SHA-256: b381b38026c710f7902a555c4be8c0ccda749a99ef7e60bbd451ea0ad290cd0f
font_01_sfnt_off0000fe25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE25 10700 bytes
SHA-256: c5556cb3bb9b9e8c69ea528197da44b60ed89013f8c13b94c1d3d9fc026134cc

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