Malicious PDF — malware analysis report

Static analysis result for SHA-256 588e7d94a38a47a4…

MALICIOUS

PDF

83.0 KB Created: 2021-03-22 05:04:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3034bb537158cf86036aede09a2c62bf SHA-1: 2d0e0f24527bb49f4e7e634289d2bc57914036af SHA-256: 588e7d94a38a47a47c6ee8f2adb478016179ab6d0fbec16f2e587ccee1a037e9
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 0.9997

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://jottigo.ru/123?utm_term=soapui+functional+testing+interview+questions+and+answers PDF link annotation
    • https://cdn.sqhk.co/kivipemo/CsqibHb/duzibadufefubonatamarukez.pdfIn PDF document text
    • https://supokiroxuleniv.weebly.com/uploads/1/3/1/6/131606692/7678062.pdfIn PDF document text
    • https://cdn.sqhk.co/wituruxa/ipd7jag/ebay_car_seller_fees_calculator.pdfIn PDF document text
    • https://pulolated.weebly.com/uploads/1/3/0/7/130740140/3ac54b.pdfIn PDF document text
    • https://cdn.sqhk.co/daborofus/gehbfCt/download_stickman_fight_battle_shadow_warrior_mod.pdfIn PDF document text
    • https://pigamudabuv.weebly.com/uploads/1/3/4/2/134235231/kopapo.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosudav/geZQuLK/31160403366.pdfIn PDF document text
    • https://cdn.sqhk.co/winogolelog/Koggphb/zasadevavimujedurafobuxe.pdfIn PDF document text
    • https://cdn.sqhk.co/rexixugepir/hiXjfbd/texas_hold_em_poker_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/mixubiki/hj3YTT1/34669839110.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
    • http://xokesuluz.epizy.com/graphic_design_proof_approval_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af332739-7dc3-405d-b4d4-5a73633b34c5/dragon_age_origins_nightmare_mage_build.pdfIn PDF document text
    • http://xorosobodudirug.rf.gd/88574688780.pdfIn PDF document text
    • http://vopepogam.rf.gd/boulevard_nights_full_movie.pdfIn PDF document text
    • http://nesitobika.rf.gd/rigulanubo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff07d6c3-2daa-4ef5-9799-cc053baabdf1/98476710651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fa4e620-188c-4b41-b28d-fb4a5f0741ff/maxtor_onetouch_4_treiber_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8210adba-74a0-4b2e-b5e0-023c9afc096d/kaliritexonutusakiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/788780fd-ad22-4e5f-9014-fa49c50d8e9a/92806003558.pdfIn PDF document text
    • http://vejajideb.epizy.com/67471030115.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_off0000fa75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA75 5584 bytes
SHA-256: b92640695fc3e408d9932de6a256792ca2911a21589aa6d371183256ed8be4cf
font_01_sfnt_off00010d7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7C 10544 bytes
SHA-256: 02e05c58518993fbec32d72a0b19a1a11dc6d55adb531837eddaf2e58baaf76f
font_02_sfnt_off0001314d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1314D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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