Malicious PDF — malware analysis report

Static analysis result for SHA-256 714bb1d3f24a124b…

MALICIOUS

PDF

67.6 KB Created: 2020-12-26 01:36:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: fb53e3586afcfb846ec2c709b9b940a9 SHA-1: 995b629572784e71dac99496d1de1712e8b8cebc SHA-256: 714bb1d3f24a124b4901eaadf3bf137a233c2917844bfa4f3a58ea1b7eda9371
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The 'commando zombie highway game mod apk' lure in the document body and associated URLs indicate a likely attempt to trick users into visiting malicious sites. ClamAV and ML classifiers confirm its malicious nature, flagging it as a phishing trojan.

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://trafftec.ru/aws?utm_term=commando+zombie+highway+game+mod+apk PDF link annotation
    • https://tanaxigurav.weebly.com/uploads/1/3/4/2/134266775/denesanijibep.pdfIn PDF document text
    • https://xixipafo.weebly.com/uploads/1/3/4/7/134745113/xinefepudap.pdfIn PDF document text
    • https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/sijuruxo.pdfIn PDF document text
    • https://suzibosefibowu.weebly.com/uploads/1/3/4/8/134883218/zigolobiwesu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460688/normal_5fa3036c8cc2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489440/normal_5fe3a54467429.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/259182.pdfIn PDF document text
    • https://xososikanezav.weebly.com/uploads/1/3/4/8/134892973/jukixuza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f916ec7f-4202-4f6a-8581-20215b512a06/4413529097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f61dbe51-1916-400d-a7c9-fbad39595cd3/karate_kata_heian_shodan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/162a8f13-1704-475b-ac67-3b3c8c9de624/carlill_v_carbolic_smoke_ball_judgme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af872c48-3cf0-45e6-b0c9-291576b8eb85/liberty_furniture_modern_farmhouse_collection.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43b99318-5b56-43cb-b46b-fbdbb3efd232/96939004962.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_off0000cab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB2 5420 bytes
SHA-256: 1c2057e99e93f27574d5d76601412f02a5b4ea6eaa95d4e751c5694bd07de4bf
font_01_sfnt_off0000dd15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD15 10740 bytes
SHA-256: dc1b170981db263da1a64b84394592f50827910b9a011735271c6c22439d9fae

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