Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d5169381a077d8…

MALICIOUS

PDF

88.4 KB Created: 2021-03-14 16:43:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 76334390432aedbe7fc1bfc2958b8a75 SHA-1: 65caff34a73bb0479efb150c9c81e0e1b2803fa1 SHA-256: e2d5169381a077d86c571d4bb2535e04e0a6c6aa2ea940a41296186a9fba97cc
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of external links and the phishing/trojan detection strongly indicate a malicious intent, likely to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/wb?keyword=true%20detective%20script%20book PDF link annotation
    • https://zoroxazug.weebly.com/uploads/1/3/4/6/134614170/jipogazixixi-rozikekov-tojumovej.pdfIn PDF document text
    • http://mereritijazos.scienceontheweb.net/bakteri_bacillus_anthracis.pdfIn PDF document text
    • https://libodarupebixab.weebly.com/uploads/1/3/0/9/130969674/fomebexe.pdfIn PDF document text
    • https://melijezaziwoni.weebly.com/uploads/1/3/4/8/134851492/zemutunixis-ruwimok-kaxuwi.pdfIn PDF document text
    • https://punulizi.weebly.com/uploads/1/3/5/9/135957491/mewagokoxazar.pdfIn PDF document text
    • http://matawobedopikam.mywebcommunity.org/bubezubutar.pdfIn PDF document text
    • https://cdn.sqhk.co/bodavadu/i8jAiaw/rtvc_haiti_download.pdfIn PDF document text
    • https://wujipomazoki.weebly.com/uploads/1/3/1/3/131384492/933374dae.pdfIn PDF document text
    • https://fajesafopumusid.weebly.com/uploads/1/3/1/8/131871419/7758557.pdfIn PDF document text
    • https://kowezuvive.weebly.com/uploads/1/3/4/6/134603832/zalojalavitelefupot.pdfIn PDF document text
    • https://zamigemunizi.weebly.com/uploads/1/3/4/3/134347724/cbade4735c6.pdfIn PDF document text
    • https://cdn.sqhk.co/kesumixom/iejg5ee/lowe_s_stockton_hammer_lane.pdfIn PDF document text
    • https://cdn.sqhk.co/detatakev/Vogduk9/kid_video_games_lawn_mower.pdfIn PDF document text
    • https://kibugisire.weebly.com/uploads/1/3/4/0/134018652/jatezulaluwid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6739ca04-605d-4ff4-b4c9-4e5bd75a7819.filesusr.com/ugd/031dda_7d6bb0bc8db34703ab6686806e396b2b.pdf?index=trueIn PDF document text
    • http://wejufutaz.onlinewebshop.net/how_to_reset_a_tracfone_voicemail.pdfIn PDF document text
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_16d503d5848942fab5c1a7ea931dd392.pdf?index=trueIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_4a270f19d302419a86d7568c8dfca428.pdf?index=trueIn PDF document text
    • http://duxepivol.myartsonline.com/disuza.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/toshiba_tv_remote_ct-90325.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/oklahoma_statutory_form_warranty_deed.pdfIn PDF document text
    • http://boxijekew.atwebpages.com/65576121973.pdfIn PDF document text
    • https://6cdb29d4-22ce-4aaf-9e51-562b59d50851.filesusr.com/ugd/1b20fb_81a708d6b74b4898be7fe13b388c01d0.pdf?index=trueIn PDF document text
    • https://e824aeac-d22a-4b45-bb3c-17051d6ee04f.filesusr.com/ugd/de60da_4ecd08e0df7e4df4ad46d4cbb8ad6d2e.pdf?index=trueIn 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_off00011f28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F28 5040 bytes
SHA-256: 08a309f78915878100dd98226bb9cb9627f1dafe72aa47875f5add2addc50909
font_01_sfnt_off00013060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13060 10620 bytes
SHA-256: 45095968ce013d21307870c63faa0d805db840ab9a7636f8a88317e9072f8124