Malicious PDF — malware analysis report

Static analysis result for SHA-256 37b3664211ff13b8…

MALICIOUS

PDF

76.3 KB Created: 2021-03-25 00:23:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 69e7d60621d2b648956fd923e08a207e SHA-1: 129b4e3d43de38ef60e7e8ba823d6c4fbc802958 SHA-256: 37b3664211ff13b826d91b992e1eadb9a82d914edba58e16f94261720aa0f269
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 0.9996

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://dafemum.ru/wix?keyword=breville+bread+maker+manual+bbm100 PDF link annotation
    • https://japejezapunat.weebly.com/uploads/1/3/3/9/133999519/sakejasekitavif.pdfIn PDF document text
    • https://vipukawolatu.weebly.com/uploads/1/3/4/4/134486161/3814977.pdfIn PDF document text
    • https://regurawuxafedan.weebly.com/uploads/1/3/0/7/130740517/tumowunenetite_zibagin.pdfIn PDF document text
    • http://prizinsta24.space/76454883444i13bh.pdfIn PDF document text
    • http://passive-income.ru/relugirakiwepujulixs435l.pdfIn PDF document text
    • https://dafubadam.weebly.com/uploads/1/3/0/8/130874240/goxupizulofu.pdfIn PDF document text
    • http://chtotakoevuxom.biz/2005_polaris_sportsman_400_carburetor_diagramy3nh2.pdfIn PDF document text
    • http://nicechange.space/26521011558auy9k.pdfIn PDF document text
    • http://hookup682.site/miwurdmtd4.pdfIn PDF document text
    • https://gofupadosu.weebly.com/uploads/1/3/4/8/134853885/riliwawisufukidirupo.pdfIn PDF document text
    • https://nabinavupofi.weebly.com/uploads/1/3/5/3/135350319/c81aa86191134e.pdfIn PDF document text
    • http://medway24.com/werupapuborawiroxazetegelfztap.pdfIn PDF document text
    • https://bipixexomalexu.weebly.com/uploads/1/3/4/3/134349320/lodeturugasovu.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/jukoxisojow/30303358137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c56ef3f4-9747-4736-a9d2-2b492d06c6fa/how_fast_do_guys_fall_out_of_love.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3deb8fe-e22f-4136-9c9e-6f7c28db390a/65296702915.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f416804e-b6a7-48f4-ae23-8e53249cda7d/gogolelugevegumigorimar.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/hunter_remote_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feab3fc9-1d2c-4da6-9b6f-91085ee1baaf/vebenixewevavib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e798ef72-c514-4014-9de3-f8391931d95f/speakeasy_ramen_springfield_oh_45505.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/9102123262.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/93021487979.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB33 5300 bytes
SHA-256: dab56ceae32a5546d302439a3f09d09354d9d241694e986da72288f266a55eb3
font_01_sfnt_off0000fd2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2C 11184 bytes
SHA-256: ab4247d1ff0d4d229c7754d79a825ee144e45005191df396418bf448cbfa1ff9

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