Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e22bc8d37a19d31…

MALICIOUS

PDF

75.6 KB Created: 2020-12-27 02:05:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f87f74825dd2003b40f5c084233ace7a SHA-1: 6057b9578994e5cbd0dc3f28ec92dc72f7976234 SHA-256: 9e22bc8d37a19d31a2f400c5aaf243eeec9a634b98c7e1859143c5557a2aa68c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to artificially boost search engine rankings. The primary URL suggests a lure related to a game download, indicating a phishing or malware distribution attempt. ClamAV and ML classifiers strongly indicate maliciousness, and the presence of embedded URLs supports the phishing pretext.

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 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.
  • 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://traffnew.ru/strik?utm_term=crazy+cooking+tour+chef+restaurant+food+game+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408476/normal_5fa9ada925f20.pdfIn PDF document text
    • https://toleminifuf.weebly.com/uploads/1/3/4/0/134017029/fawuwuwov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496165/normal_5fe15e37b65aa.pdfIn PDF document text
    • https://cdn.sqhk.co/lasotepana/dghfaif/california_lottery_scratchers_online.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/fhapnjd/infectious_disease_specialist_dallas_tx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413866/normal_5fad58ed8249f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367301/normal_5f89b48ad40e7.pdfIn PDF document text
    • https://nadosivilir.weebly.com/uploads/1/3/4/3/134316305/3307449.pdfIn PDF document text
    • https://lapedegino.weebly.com/uploads/1/3/4/6/134689006/paguruwixalu_bokuvalib.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/wekibik/zifax.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/manual_for_doss_soundbox_bluetooth_speaker.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/bass_fishing_guides_ontario.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/gewisozor.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_off0000e833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE833 5660 bytes
SHA-256: 148499be73fabffa106464385cf419877921f9ce2f1365228acc31647cc25dc2
font_01_sfnt_off0000fb66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB66 11088 bytes
SHA-256: 08531401dd10da6af47aa799e9a3e363bb6570169918397579dc4098ed375214

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