Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ed12a0b7c6d0e7…

MALICIOUS

PDF

80.1 KB Created: 2021-03-25 17:43:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 291db180360bdae1edb0798bfede2cd8 SHA-1: 98e203be83fc3f8a68ea6d19fe7df27939c1bd2e SHA-256: 72ed12a0b7c6d0e7bb2a90883947261a2d2b201e2e7b57501dca8beb2e7857a4
154 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including being flagged by a machine learning classifier and ClamAV as a phishing trojan. It also contains external URIs and is part of a link farm on disposable hosting, suggesting it's designed to redirect users to malicious sites. The presence of a download button lure and a callback lure further supports a phishing or scamming objective.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://fokemale.ru/award?keyword=atomic+structure+allen+notes+pdf PDF link annotation
    • http://wameduxuka.iblogger.org/dapodofomag.pdfIn PDF document text
    • https://cdn.sqhk.co/jisanipu/SL1jcjj/28752276836.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/gQijnjg/furniture_steam_cleaner_walmart.pdfIn PDF document text
    • http://losasawavezu.iblogger.org/18348900946.pdfIn PDF document text
    • http://tugeraz.22web.org/94207037371.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwolupenilu/jfiaibZ/bubble_bobble_codes_nes_classic.pdfIn PDF document text
    • http://tuwuradozanava.iblogger.org/curso_ilustracion_botanica.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/7de9a300-ee65-403b-b6af-8853cc0f8eb2/sarah_dessen_book_list_in_order.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/13396194804.pdfIn PDF document text
    • http://janaradoru.rf.gd/california_dreaming_guitar_chords.pdfIn PDF document text
    • http://boraxatisota.rf.gd/37866004054.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/college_admission_essay_format_mla.pdfIn PDF document text
    • http://topagujowulefe.epizy.com/54237000049.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/section_5._5_intermolecular_forces_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/foxemos.pdfIn PDF document text
    • http://retesatitogeli.epizy.com/free_portfolio_templates_for_wordpress.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8399baf-7bc5-4925-970b-da62dc2eab86/26164692148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93aa81c6-70f4-40f6-a690-599bab763146/4854521934.pdfIn PDF document text
    • http://poradenojipedu.rf.gd/l_avantage_concurrentiel_michael_porter_gratuit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1981bffd-c8b1-4ffe-afef-4a038b7edbd3/44619803588.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE456 5288 bytes
SHA-256: 45bd8e4856d94908b0db868d6a310edbd3034eea212f1ec2ec34d81fe5994635
font_01_sfnt_off0000f63a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63A 10968 bytes
SHA-256: f1383a7bd134263200938753c879b19161418c979a2f5f41eb025146c2f33d40
font_02_sfnt_off00011bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF3 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3