Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9467fd152b8641f…

MALICIOUS

PDF

65.0 KB Created: 2020-12-16 14:42:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 212c7b26572f2041b0f26e45a1af5a52 SHA-1: 98b7129b107325b14f02e167c0242e02914a6647 SHA-256: f9467fd152b8641f19db0faf880a2a36b0e556197d614971cf697737566c0e5d
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically identified as a malicious redirector. The heuristic firings indicate the PDF is designed to link to a large number of external resources, likely for SEO manipulation or to obscure malicious destinations. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=summoner+names+for+sale In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403259/normal_5f92ed05e5d79.pdfIn PDF document text
    • https://bebujufexuxiki.weebly.com/uploads/1/3/4/6/134624407/8113005.pdfIn PDF document text
    • https://moxatabik.weebly.com/uploads/1/3/4/8/134885740/nifelipawur.pdfIn PDF document text
    • https://bisigategisabuv.weebly.com/uploads/1/3/4/8/134884720/3713578.pdfIn PDF document text
    • https://xovobinawulum.weebly.com/uploads/1/3/4/8/134883327/bitubapupalatu.pdfIn PDF document text
    • https://tixovokibena.weebly.com/uploads/1/3/4/1/134109053/luwesobixo-siniderofoki.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/suzeduselu/android_game_development.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32ed849d-ae11-4540-8ca1-89952346d31b/bosch_jigsaw_1581vs.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/blockbuster_mp4_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/act_1_the_crucible_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/gogemogejo.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/consumer_reports_best_suv_2014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2c84511-6a97-4ba7-930f-4ae491d550f3/fasuxoludos.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/spot_gen_3_user_manual.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE8F 5016 bytes
SHA-256: 7ade54b0a4b93b45c33f304e56c17483055ef8170691656d8718a2decd88ba94
font_01_sfnt_off0000cf81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF81 11684 bytes
SHA-256: d5af89a5c8498d95beb69887a69824900b3cd029925ff7a97647f4ed1515c187

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