Malicious PDF — malware analysis report

Static analysis result for SHA-256 91caa6c204a29f12…

MALICIOUS

PDF

77.6 KB Created: 2021-03-19 10:23:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 649a877695eb86e38e54aaff09611664 SHA-1: 1610c12271c40cce55a84288ced4dd9335b9ef66 SHA-256: 91caa6c204a29f1269959bbac8747341294c5dda13caaf4f34aaeae7ff578897
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9993

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
  • 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://xezojetit.ru/strik?utm_term=how+does+warp+work+in+trouble+game PDF link annotation
    • https://cdn.sqhk.co/rosubeno/uAhgAhc/foot_locker_brooklyn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406501/normal_60248ab496771.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475863/normal_6048a9e160bb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481834/normal_602b55523ceb5.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/fJihBgj/dusesugetebugumojo.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/chljigh/fakituxefi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a001dc82-f31e-4944-9b76-0a8e602b6855.filesusr.com/ugd/e4ee87_2a00184d83da46058e756b090a896f02.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sezewu/bovuparopegifabadirex.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/k20_pro_android_10_update_india.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/wobukagirumifoxoxiboso.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/94454910465.pdfIn PDF document text
    • https://4a5660cc-52a2-48ff-9acb-4b4f1704cb6e.filesusr.com/ugd/81868d_4939b352f644480286374360da3995c9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/wawavujuzosemitupuma.pdfIn PDF document text
    • https://e9abb47e-19e5-4ec2-9f3c-2aa4e6f2bf0a.filesusr.com/ugd/92be99_56605ad656ae43c78b72b8857f69509a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/building_blockchain_projects.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/migefe.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/47717746178.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/vaastav_movie_movies_counter.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/gavebexuzikaku.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/biomet_radial_head_replacement_technique_guide.pdfIn PDF document text
    • https://abee6ad4-cf47-459a-954e-22b9b9bb30ad.filesusr.com/ugd/4bdc6d_67bd7af195f449d8bd10eaa80e7f9119.pdf?index=trueIn PDF document text
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_02afc0856bcf4e7bb173fa6bfaa6f45e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sorogamat/tikesezal.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 5

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_off0000f1b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B8 5536 bytes
SHA-256: 55ba27d1dce70a19b9f5d85034a45cdec5ce692222719c1210b2520c15713352
font_01_sfnt_off00010483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10483 10704 bytes
SHA-256: 67dc52f83352113b65ff1585b7d6b824f7afdf87e3c98dff374476f5ff296744

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