Malicious PDF — malware analysis report

Static analysis result for SHA-256 a12eac4a80fce7ef…

MALICIOUS

PDF

120.9 KB Created: 2021-03-28 13:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 85930ef05253eec1bc4fdcbf3df3a5f5 SHA-1: 95aa2bfe86afb4ded348083a22f7b965d475d4f4 SHA-256: a12eac4a80fce7ef114c2a88c138cf4e5221327281d9ef923c02fb67e5e5a5a8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9999

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://fokemale.ru/award?keyword=trastornos+de+la+conducta+alimentaria+definicion+pdf PDF link annotation
    • https://guditeni.weebly.com/uploads/1/3/4/5/134529862/davajawom-mitazowe.pdfIn PDF document text
    • https://lupunudarowujak.weebly.com/uploads/1/3/4/5/134599946/jikamux_woregiponen.pdfIn PDF document text
    • https://wawogikaso.weebly.com/uploads/1/3/4/7/134726687/xopex-tojaxegetobomot.pdfIn PDF document text
    • http://sidufapas.mywebcommunity.org/pukemowuxiwe.pdfIn PDF document text
    • http://my-favshopg.online/what_is_the_formula_for_net_cash_flow64tlz.pdfIn PDF document text
    • http://wtia.space/zaluseburuvedasoperugex70ry0.pdfIn PDF document text
    • http://lelatufepema.22web.org/sukovufagaj.pdfIn PDF document text
    • http://bajoreto.sportsontheweb.net/new_english_file_elementary_teacher_s_book_slideshare.pdfIn PDF document text
    • http://tcerkovniekupola.space/how_to_change_diablo_2_cd_key_manuallyuu7dh.pdfIn PDF document text
    • http://wekeb.space/49531308338b8v6p.pdfIn PDF document text
    • https://janepaxe.weebly.com/uploads/1/3/4/0/134097288/vaxefuden_xifizodasige.pdfIn PDF document text
    • http://xofelivigavas.mywebcommunity.org/key_marketing_concepts.pdfIn PDF document text
    • https://gisevivejomu.weebly.com/uploads/1/3/5/3/135393920/6214863.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f04d248e-b20c-493f-8968-f024cba02982/speed_queen_dryer_parts_list.pdfIn PDF document text
    • http://tamobofi.rf.gd/jolamivivefa.pdfIn PDF document text
    • http://xonolori.atwebpages.com/93602768352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87caea38-d54d-43d4-9472-f02621bc58ed/sojourner_truth_aint_i_a_woman_speech.pdfIn PDF document text
    • http://nekabet.epizy.com/10737399926.pdfIn PDF document text
    • http://mekasesajiw.onlinewebshop.net/72635940545.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1426aa21-a61e-4979-9def-468b9feba8d0/bivawifafazevofabunuker.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_off00019909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19909 5248 bytes
SHA-256: dc0781b35e9920ec705085b9bd15342cdc2b8f6a3a0897cff0905a9261ee23c0
font_01_sfnt_off0001aacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AACB 12684 bytes
SHA-256: dba79d0d5c060594a889f0c0f0b344a21622d777644d66d55c29840771d8a653

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