Malicious PDF — malware analysis report

Static analysis result for SHA-256 d22cd31a40e82493…

MALICIOUS

PDF

75.3 KB Created: 2021-03-18 12:18:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 848cc10c72f0b5bfb3b1f7ad3f09859f SHA-1: 19d7452d854dcda189bbef9150c473eed5cc43c5 SHA-256: d22cd31a40e824934debb7ed68d77469e3cc7e9a2e6e1eac11d1257d7c48c310
206 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to obscure the ultimate destination. The document body, though heavily corrupted, contains keywords related to a business plan, likely a lure to encourage users to click the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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.
  • 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://jottigo.ru/award?keyword=rabbit+farming+business+plan+pdf+south+africa PDF link annotation
    • http://xawegap.mywebcommunity.org/smart_watch_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/aihtvib/download_game_ultimate_offroad_simulator_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kosifodalab/eibirig/free_weekly_lesson_plan_template_word_document.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/ibmhIig/extreme_landings_game_apk_download.pdfIn PDF document text
    • https://tujiniwiko.weebly.com/uploads/1/3/5/3/135350236/mezitisuzurin-jukatewiv-gifixatitexid-jamumopemopera.pdfIn PDF document text
    • https://cdn.sqhk.co/kebubupoxiz/jgsgdNF/niduve.pdfIn PDF document text
    • http://nutosuvitiraj.scienceontheweb.net/civ_6_gathering_storm_starting_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/hiiiije/93205323175.pdfIn PDF document text
    • https://ranazujip.weebly.com/uploads/1/3/5/3/135398887/dofotafobiworewotes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f8d82b49-d438-4da2-b906-f876cb6fe635.filesusr.com/ugd/12dc78_7dd5bea900c346f4bbd531c035564cab.pdf?index=trueIn PDF document text
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_74645e296ab4476093d67a3e8bea4db8.pdf?index=trueIn PDF document text
    • http://gobaligene.epizy.com/writing_alphabet_letters_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18eea69b-8ee5-409f-ad22-9e8c7ebd627f/bikinapagodoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a58e28f4-8fb8-4afa-a323-db809e2a7b18/57314498202.pdfIn PDF document text
    • https://f3dbd103-cf2f-44fc-b0ad-c9004dc38af2.filesusr.com/ugd/1f2646_eb921edc205841a4a8489d224819d04c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/212c4b21-da7e-44c4-bec8-913c32a5173e/ebook_organizational_behavior_17th_edition_-_standalone_book.pdf.pdfIn PDF document text
    • https://882e4f53-a7e1-4d4a-89e8-a6e6d9f9b805.filesusr.com/ugd/9a13d2_645fb33a26b44090a7e03fd1693b05e2.pdf?index=trueIn PDF document text
    • https://50fe66f1-00be-429c-ab6c-57a9f80d6ab9.filesusr.com/ugd/39cb9d_40881bf0817141dda6eff1eb21d33cff.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e46b34be-67d3-4ffe-9353-3769cb3661e6/wanigazupemurowavolexe.pdfIn PDF document text
    • http://bafimilatape.epizy.com/zapepabepomapafobub.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_off0000e76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76B 5716 bytes
SHA-256: a9c15406a4b2b8450e950db61ed9ece8a7bc140d2a7a41a66238a37b253e9d21
font_01_sfnt_off0000fab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB6 10812 bytes
SHA-256: 4184851d8608131d983a4533b27f9adc1fc4a5215a8f955c67758a61fac54aa5