Malicious PDF — malware analysis report

Static analysis result for SHA-256 16d13bc6794db011…

MALICIOUS

PDF

87.9 KB Created: 2021-04-04 23:03:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 67f2007b0a1525608cce836bf322ca46 SHA-1: 185adc1dfa1abf61075c8db2806ab571622c3c63 SHA-256: 16d13bc6794db011d0982b596684d483681b7eb2f6347cfe6e3c22872635901e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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.
  • 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://nipisod.ru/award?keyword=blue+moon+lee+child+pdf+download PDF link annotation
    • http://beviluxenumiliv.mywebcommunity.org/sony_wireless_headphones_mdr-rf985r_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/fujonexa/1Cgiico/ahri_rpg_poro_farm_mod_apk.pdfIn PDF document text
    • http://goproits.com/54831015495vc5po.pdfIn PDF document text
    • http://7lessons.fun/4040967832riebi.pdfIn PDF document text
    • http://zanovekolasin.mywebcommunity.org/ernie_ball_volume_pedal_scratchy.pdfIn PDF document text
    • http://tigesonepovar.66ghz.com/nagegegepekusirubupiwuz.pdfIn PDF document text
    • http://ketoxitigojaluk.sportsontheweb.net/voxosu.pdfIn PDF document text
    • http://likefetevu.getenjoyment.net/when_dimple_met_rishi_show.pdfIn PDF document text
    • http://xisofujevom.22web.org/cationic_surfactants.pdfIn PDF document text
    • http://vifepixakusuped.iblogger.org/how_to_get_a_copy_of_my_marriage_certificate_in_nova_scotia.pdfIn PDF document text
    • http://rukafijawidataw.iblogger.org/tachycardie_atriale_multifocale.pdfIn PDF document text
    • https://cdn.sqhk.co/wirumedaba/dificie/falling_for_christmas.pdfIn PDF document text
    • http://websporizle3.com/6109403924112ydb.pdfIn PDF document text
    • http://useplafond.xyz/69009581891lise1.pdfIn PDF document text
    • http://chtotakoebezuz.biz/52732030905tfe08.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://pidukuniwid.epizy.com/general_knowledge_question_and_answer_in_tamil.pdfIn PDF document text
    • https://b5f169ef-6bcf-4d19-a24b-32bdc9dd7a5f.filesusr.com/ugd/2e79a6_306d56039a144d0aba7d0b111289e9bb.pdf?index=trueIn PDF document text
    • https://a49ec80b-b4e3-4dac-84ed-d687b6aff6a5.filesusr.com/ugd/46d696_e9c475cc452d44f792ed3681a61fa97f.pdf?index=trueIn PDF document text
    • http://pezatiwasab.epizy.com/oracle_sql_queries_free_download.pdfIn PDF document text
    • https://899154e9-876a-4ab4-94d5-c8ef2aed10f2.filesusr.com/ugd/dcf9ad_65d17ff645b7449ebe840a1d280d847c.pdf?index=trueIn PDF document text
    • http://zepizevut.atwebpages.com/74690139962.pdfIn PDF document text
    • https://d497f082-4895-42de-a72c-038d9367c8a3.filesusr.com/ugd/8e727b_fb46d0ab81a04303bbb1ec06c81b18bb.pdf?index=trueIn PDF document text
    • http://jilevatawew.epizy.com/75436743263.pdfIn PDF document text
    • http://tanebani.epizy.com/19705644980.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001094b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094B 5064 bytes
SHA-256: 37ca6b3ac710d1802bf965fb4c4e0452b54473698571d30cefdc4eb418a4334a
font_01_sfnt_off00011a65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A65 11708 bytes
SHA-256: e603d3be75aef99d8601a4512ec648aff8828fd82622bf927086f7006e83d338
font_02_sfnt_off00014242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14242 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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