Malicious PDF — malware analysis report

Static analysis result for SHA-256 a664fe9fa71a7196…

MALICIOUS

PDF

76.1 KB Created: 2021-02-25 12:40:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0d5e1251aca7395f0af980540fb2defe SHA-1: 5f5aa555f064da97dd1be1a01fd4a5ce5ca55277 SHA-256: a664fe9fa71a7196188f9b3f61456ce9fff0e0d613ce5fbb11d90765e2974de5
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF was flagged by multiple heuristics as a link farm, containing numerous external URLs pointing to potentially malicious or SEO-abused content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the nature of link farms often involves JavaScript for redirection or obfuscation, and the presence of many external links suggests a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/wix?keyword=mitsubishi+mr+slim+par-jh050ka+user+manual PDF link annotation
    • http://vitalia-transports.com/polaris_trail_boss_250_parts_diagramydyef.pdfIn PDF document text
    • https://xoresobo.weebly.com/uploads/1/3/1/4/131407398/b29a48f3ca86.pdfIn PDF document text
    • http://smartbright.club/rokenimedexedifof3jiev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498868/normal_6026f25f0de52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475588/normal_6010b18fd3a21.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/fheuPhf/box_office_predictions_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/XhgVBze/75274115002.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/hjfJgdU/foderamexukakinodone.pdfIn PDF document text
    • https://cdn.sqhk.co/rubogomuweme/jfDEhd8/roman_numerals_converter_date.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372076/normal_5fc96bbb231c8.pdfIn PDF document text
    • http://lotto-investclub.com/1950500636c0vrm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446636/normal_60247b99ec856.pdfIn PDF document text
    • http://xitabijasava.getenjoyment.net/how_to_hook_up_sharper_image_wireless_headphones_to_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/heigjfh/top_up_diamond_free_fire_murah_dunia_games.pdfIn PDF document text
    • http://wildboost.club/59026088427206xh.pdfIn PDF document text
    • http://copyright-security-ig.com/85389558382p6pzp.pdfIn PDF document text
    • http://magnetfix.store/zizafoweviwesuraredixubodg4kpu.pdfIn PDF document text
    • http://dreamingdeveloper.com/btdt_meaning_in_englishi5cj0.pdfIn PDF document text
    • http://pelistens.xyz/povonagsfgry.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sogivuwe.onlinewebshop.net/67317637862.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_off0000ecee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEE 5640 bytes
SHA-256: abf448aca1010d3a404be6478d4f985a538eafb2a4659e14bace87e0da750fde
font_01_sfnt_off0000ffff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFF 10196 bytes
SHA-256: ee92fcb3da1c17ae97e6f8aac4f8df7880186434f522aab6471133c37d35a5d5

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