Malicious PDF — malware analysis report

Static analysis result for SHA-256 a97d2c813ab0c496…

MALICIOUS

PDF

86.2 KB Created: 2021-02-26 01:30:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9f61f8926b9744c1d426fd2b429a4009 SHA-1: 6ebbed9eead52fce7edac847968b7d0bb5608579 SHA-256: a97d2c813ab0c49658756a252547778d44875035a36489d4527b7249f336e70b
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-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://crophysi.ru/123?utm_term=is+the+movie+hidden+on+netflix PDF link annotation
    • http://getdouche.xyz/zifinezujomakikesv2.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/30511515645.pdfIn PDF document text
    • https://nasaxedinevizuv.weebly.com/uploads/1/3/4/7/134759800/zavuz_gokax_namezasaxagewa.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/iiZhcii/frog_craft_activities.pdfIn PDF document text
    • http://lezeninimi.medianewsonline.com/yard_machine_3.5_hp_edger_oil_change.pdfIn PDF document text
    • http://retamos.mygamesonline.org/where_can_i_buy_a_christmas_tree_for_cheap.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/python_tutorial_for_beginners_with_examples.pdfIn PDF document text
    • http://fejekadiwoxobiz.getenjoyment.net/zoom_h4n_pro_handy_recorder_-_black.pdfIn PDF document text
    • https://menanotiji.weebly.com/uploads/1/3/4/3/134322389/ac982374553.pdfIn PDF document text
    • http://limaxinsto.xyz/budget_spreadsheet_in_excel_free7uhs2.pdfIn PDF document text
    • http://bbbbbbbbeeee.space/69033726133s01si.pdfIn PDF document text
    • https://gigumozogewa.weebly.com/uploads/1/3/4/5/134597084/8662341.pdfIn PDF document text
    • http://namedaun.fun/mr_bechara_film_songip882.pdfIn PDF document text
    • http://xevusezes.medianewsonline.com/ravefusis.pdfIn PDF document text
    • https://wupupuredizuso.weebly.com/uploads/1/3/4/8/134894828/2a252be.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/97827191494.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
    • https://s3.amazonaws.com/bitajemisajoz/36625475682.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/accounting_definition_by_different_authors.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/51626563482.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_off00010933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10933 4696 bytes
SHA-256: acc3f9d771ae8ddb51ea3e78b2cc7562caf48407b368289f90e139654d93de73
font_01_sfnt_off0001190e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190E 10896 bytes
SHA-256: 1cd63139177576a716ba7eb28d24724629ec63afed21f7f937518a58e0b13ec4
font_02_sfnt_off00013d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D73 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3