Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff299fb5d0b26b6…

MALICIOUS

PDF

74.1 KB Created: 2021-02-25 18:24:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a6e40ad202767093f2429ce73172db8f SHA-1: 14223ba58a312c40f61a379fffe86637de0f0883 SHA-256: 2ff299fb5d0b26b68ee528e780e05962536996cdfd6eabf37e7f24facb4957d4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 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://seumenha.ru/123?utm_term=gift+of+the+magi+essential+questions PDF link annotation
    • http://paringljkf.com/jiffy_lube_coupons_californial9aij.pdfIn PDF document text
    • http://punejew.mygamesonline.org/flat_stanley_books.pdfIn PDF document text
    • http://repair-telefonov.ru/free_hoodie_template_vectors9nna.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/cisco_introduction_to_networks_chapter_3_exam.pdfIn PDF document text
    • http://ostanni.fun/35930158296h1k3a.pdfIn PDF document text
    • http://true-board1.club/japanese_coches_hiaceywun7.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/jawizogufisemotekalotev.pdfIn PDF document text
    • http://electriccannoz.club/geometry_for_enjoyment_and_challenge_answerskixjb.pdfIn PDF document text
    • http://zegererevez.medianewsonline.com/vujitibijezudigosuderi.pdfIn PDF document text
    • http://svoylend.xyz/21309193680580rx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/salade/apg_cash_drawer_manual_open.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/latest_avon_brochure_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/43413642419.pdfIn PDF document text
    • http://kepipejesa.epizy.com/gomafo.pdfIn PDF document text
    • http://felalosekubav.epizy.com/26550376041.pdfIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/abraham_hicks_the_amazing_power_of_deliberate_intent.pdfIn PDF document text
    • http://bakajejupuxa.epizy.com/29851153373.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/instagram_ios_7.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_off0000e51c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51C 5244 bytes
SHA-256: 1968a84ba961d1308ab82919e7ab2f99ee5b93aa54dbabc46c951bbb32fd898a
font_01_sfnt_off0000f6ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CE 10716 bytes
SHA-256: 775d99dae9abbdddd8bd12dc802afea388705d2b04fa13c43484333a4c904935