Malicious PDF — malware analysis report

Static analysis result for SHA-256 dede60a41e3da272…

MALICIOUS

PDF

79.4 KB Created: 2021-03-14 18:55:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1272e3904b74b9a52f3390a7b8e9b1d6 SHA-1: 9187e50b16b1812376124b5442d22191b36917f1 SHA-256: dede60a41e3da272036d681d3df88910d7724608347e89d44cd73b76a5d33bed
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 0.9996

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://mezovuduw.ru/wix?keyword=games+for+bears+bmx PDF link annotation
    • https://dofikusoru.weebly.com/uploads/1/3/4/4/134472045/ponen.pdfIn PDF document text
    • https://cdn.sqhk.co/depivuni/gihjbia/82570636273.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/ahcjdhb/10_pin_shuffle_pro_bowling.pdfIn PDF document text
    • http://zawukinaloluku.sportsontheweb.net/learning_spanish_basics.pdfIn PDF document text
    • http://wosedumuf.mywebcommunity.org/31037374314.pdfIn PDF document text
    • https://manesufepal.weebly.com/uploads/1/3/1/3/131381078/noserotuvazenap_nawevel_midogijivuxopup.pdfIn PDF document text
    • https://nitiruminaxodax.weebly.com/uploads/1/3/0/7/130738633/kipek.pdfIn PDF document text
    • https://cdn.sqhk.co/misusulebix/swcheoj/dead_adventure_into_the_zombies.pdfIn PDF document text
    • http://arenda-comp.space/98250642305uv5it.pdfIn PDF document text
    • https://kunolutupevuj.weebly.com/uploads/1/3/4/7/134772201/2150175.pdfIn PDF document text
    • https://rizomoxus.weebly.com/uploads/1/3/4/5/134589692/moserovubelupaf.pdfIn PDF document text
    • https://wepeweguwerixum.weebly.com/uploads/1/3/1/8/131856135/golerawoj.pdfIn PDF document text
    • http://worozoxiw.sportsontheweb.net/75362905863.pdfIn PDF document text
    • http://varietystore.website/vikatan_magazine_password2j1s3.pdfIn PDF document text
    • http://goossyy.online/ars_notoria_espaolu78oh.pdfIn PDF document text
    • https://cdn.sqhk.co/negixakozaxu/eshjjaD/fraction_number_line_worksheets.pdfIn PDF document text
    • http://health-top.ru/company_of_heroes_2_ardennes_assault_mission_listdsasl.pdfIn PDF document text
    • https://zekufizow.weebly.com/uploads/1/3/0/7/130775694/e47bf377c2.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/dujepav/11404129595.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/how_to_clean_my_zojirushi_water_boiler.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/fudenojigaw.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/gcf_worksheets_grade_6.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_off0000fa89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA89 5120 bytes
SHA-256: 9e83e24afec66ed16ade2d81ed2a81dd4ce6f5b4d8ccedb61e14bcc88cc9bfa9
font_01_sfnt_off00010be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE5 10848 bytes
SHA-256: b01277aadcc9baf5cc91d25666327a7f4970b2265c9491bc4d1cf5685878f399

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