Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a217560ed4b339a…

MALICIOUS

PDF

81.0 KB Created: 2021-03-21 07:01:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: af971004737a15243972ce1c252d6d63 SHA-1: 7911bbbf7d9fb8135543302879dd16a6bf578874 SHA-256: 7a217560ed4b339af91c239217fe835b7aaff8f2a8c82ada2feaaa78a8cdeb7d
134 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing lure. The presence of a 'download' button heuristic further supports a deceptive download attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's designed to redirect users to malicious sites or initiate unwanted downloads, likely as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/award?keyword=logical+reasoning+questions+and+answers+for+placement+pdf+download PDF link annotation
    • https://xepekozodixati.weebly.com/uploads/1/3/5/3/135346226/ec7c0efb7db8ab5.pdfIn PDF document text
    • http://chelamela.org/letterhead_word_2010_templateqcbdz.pdfIn PDF document text
    • https://boxizegovabore.weebly.com/uploads/1/3/1/3/131379280/pogukosej_tuwav.pdfIn PDF document text
    • http://adv-workshop.site/mokidefapidakesaritbh2l.pdfIn PDF document text
    • http://jixapijojuxev.iblogger.org/cisco_ise_3515_data_sheet.pdfIn PDF document text
    • http://astrohelp.space/vox_ad30vt_manual_espaollf8xq.pdfIn PDF document text
    • http://accueilcmb.com/88301112892sdgze.pdfIn PDF document text
    • https://gimimelaxagoke.weebly.com/uploads/1/3/2/7/132740951/3f525c5e0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_600c0bacf1c0e.pdfIn PDF document text
    • http://lishop.site/cyberpunk_2077_xbox_one_game_passp2qmu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490256/normal_601a714f5d902.pdfIn PDF document text
    • http://robolab.one/640091996715fylw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408323/normal_60539c757bbc3.pdfIn PDF document text
    • http://energytik.net/jijum0ic30.pdfIn PDF document text
    • https://luragelekow.weebly.com/uploads/1/3/4/3/134377287/sobubizalexi.pdfIn PDF document text
    • https://moxusovilala.weebly.com/uploads/1/3/0/7/130738705/758990368855f9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vufufule.epizy.com/letamafitewalazewe.pdfIn PDF document text
    • http://pajoxewujovero.rf.gd/applied_mathematics_3_by_hari_arora.pdfIn PDF document text
    • http://piserujirabubam.epizy.com/zufax.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA17 5516 bytes
SHA-256: 9533f2286a3252caeba3a0da3124edc6ecb28b9217bdb4ad0b6b32527d7d2c18
font_01_sfnt_off0000eccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCB 11088 bytes
SHA-256: 2cf90325b291d7502db341a614eb687e43a7c441d818974be331db9a9915446a
font_02_sfnt_off00011287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11287 16144 bytes
SHA-256: fb10e5badbbf29d6a05184c763452604a6d256f7c208a2bb674868c670b14a78
font_03_sfnt_off00012782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12782 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378