Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d893e3a5f361f06…

MALICIOUS

PDF

71.7 KB Created: 2021-03-11 03:33:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 9fa7f4ac3a862683e856df93ee8c954f SHA-1: 9bfbc288a704ba5e06fc6bb14f394f1490d942b1 SHA-256: 9d893e3a5f361f06b606d78ab13d7c9690a95888a4d1e1c92d49a29524dd6b95
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicative of a link farm or SEO spam. ClamAV and ML classifiers identified the PDF as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 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.
  • 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://lozipotod.ru/award?keyword=past+perfect+already+and+yet+exercises+pdf PDF link annotation
    • http://jubemexor.22web.org/fowotozela.pdfIn PDF document text
    • http://sazijanisa.22web.org/84874485470.pdfIn PDF document text
    • https://fidifeso.weebly.com/uploads/1/3/1/4/131408027/lijukobetadek_wimesi_jebup.pdfIn PDF document text
    • https://lilususuki.weebly.com/uploads/1/3/4/3/134317990/ca18930a7c.pdfIn PDF document text
    • http://joxutodotuwosej.22web.org/ziwapomupumixo.pdfIn PDF document text
    • https://wafugavewe.weebly.com/uploads/1/3/4/3/134369352/5609158.pdfIn PDF document text
    • https://segawalapuk.weebly.com/uploads/1/3/4/9/134902876/motukuve.pdfIn PDF document text
    • http://xaduwojitodefo.66ghz.com/bba_full_form_tamil.pdfIn PDF document text
    • https://nifilikipugibib.weebly.com/uploads/1/3/4/6/134608039/1618223.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pukokudew.epizy.com/avatar_game_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40b9d883-c9a1-4a3d-b630-c3197c67b203/why_is_samsung_fridge_not_making_ice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a83b1a33-86ae-4046-b1f1-c8fdfd8edcaa/the_bet_by_anton_chekhov_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b7b4548-0cda-40d9-b22b-9c93fd5ea63e/the_scarlet_pimpernel_cast_1982.pdfIn PDF document text
    • http://ketoxuxun.epizy.com/pizotipofawatiguwisuwalib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f00312a-c437-4927-a9e7-76ca4ca77cfc/70723534655.pdfIn PDF document text
    • http://widadipadiv.epizy.com/canon_eos_700d_instruction_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/462ba6fe-64f3-46cb-a9f4-0cc2db3df089/dr_llaila_afrika_passed_away.pdfIn PDF document text
    • http://mopiluganaloriz.epizy.com/solicitud_de_visa_para_novios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1882eeaa-4be1-4116-8c8d-5764a24cd291/1088458966.pdfIn PDF document text
    • http://koxepari.rf.gd/81613005639.pdfIn PDF document text
    • http://vulikoviluxugu.rf.gd/woxoba.pdfIn PDF document text
    • http://muvubaxu.epizy.com/brave_animated_movie_english_subtitles_free.pdfIn PDF document text
    • http://surobufalinaxis.epizy.com/losetikezi.pdfIn PDF document text
    • http://binuxusegewake.epizy.com/49484381390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/599dffc8-ce6f-4e95-857a-13281bf42594/what_are_the_three_elements_of_poetry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/501b1b27-570b-4b05-94be-b755e8dfbe40/58502201195.pdfIn PDF document text
    • http://vabopegimunufet.rf.gd/79811052935.pdfIn PDF document text
    • http://mukubalevi.rf.gd/eddie_bauer_jogging_stroller_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff81ad19-1db4-4e95-ba87-b17570671dec/final_fantasy_vii_remake_strategy_guide_book.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_off0000dc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6D 5320 bytes
SHA-256: cbbaab03983b6e4643297b2de58c782f939d956a9f4595ad22816c0488cea06a
font_01_sfnt_off0000ee9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9F 9968 bytes
SHA-256: 37d6f07ff3290a436090b8a826192a9d27d25c306c5464c5fcbe3b5d09dbdc56