Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2d9a25a4f819335…

MALICIOUS

PDF

79.4 KB Created: 2021-03-26 05:36:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0067f2a4791a26afe343bd98758ddbfd SHA-1: 53b136289f5d1e87a7c116c354f3eef65678b27c SHA-256: b2d9a25a4f81933555b8b12f9acca1e29d1d25295d390cc7427d98862a1d6fae
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 0.9957

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://jacksth.ru/strik?utm_term=my+schlage+lock+isn%2527t+working PDF link annotation
    • http://kifopelidito.mypressonline.com/51911422239.pdfIn PDF document text
    • https://kalogipewaga.weebly.com/uploads/1/3/4/5/134595512/zunasusetolip_gaginapabos_diganuruwadiw.pdfIn PDF document text
    • https://rukuzidin.weebly.com/uploads/1/3/4/5/134517246/katuzibavepetu-bakuzez-zijopidudoxin.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/5251e57ea87c00.pdfIn PDF document text
    • https://kivogumit.weebly.com/uploads/1/3/1/0/131070776/lemawodapijog_serowomifupigu_vibazezazufepuv.pdfIn PDF document text
    • http://tohld.in/sazidufupafop8m.pdfIn PDF document text
    • http://moresukko.ru/87052723048jnyw2.pdfIn PDF document text
    • http://vienvozvrat.site/the_count_of_monte_cristo_summary_chapter_1-10wrlad.pdfIn PDF document text
    • https://webunufilijamo.weebly.com/uploads/1/3/4/6/134677486/zavibe.pdfIn PDF document text
    • https://cdn.sqhk.co/jibezilesu/ieQhbGj/download_gears_logic_puzzle_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jimatoju/gh1ecic/idle_light_city_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/F4jdMFm/demon_slayer_rpg_2_breathing.pdfIn PDF document text
    • http://likefetevu.getenjoyment.net/gudevefekiware.pdfIn PDF document text
    • https://cdn.sqhk.co/diwiporeb/taHYggG/64227196001.pdfIn PDF document text
    • http://sexedate69.site/suvusixifubejogivexupozou1k.pdfIn PDF document text
    • http://podarokinsta.site/bugusetiragikinujigiq18u9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/adairs_world_s_softest_cotton_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/591113a9-62ab-4f4c-b3fa-502537d22b4a/sanezavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5e797b5-3e36-4de1-9aa1-98090e8e07a9/54693016637.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/gofiletokopaxom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/434e1dc9-d8b8-4d05-842f-15e388a36fa2/tatakupokaker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a88518f-f0b4-43cc-a5ce-7176a1f7bf24/discussion_questions_shooting_an_elephant.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/10048446495.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/tizetafesasapekifijopi.pdfIn PDF document text
    • http://jemileti.atwebpages.com/alto_shaam_smoker_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/11095236032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1478ee6-3fd6-45dd-806a-a15a5f37cdaf/39662057440.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_off0000f7d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D3 5356 bytes
SHA-256: af435f54a7557abf481aae10161b52e9ccf1a214306294d46bfb543441c988cc
font_01_sfnt_off00010a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A35 11064 bytes
SHA-256: 90b9917c31bd8f13e14ed980c1be5c834ae8171974f9d7c0acfd0759ae5fb1a9