Malicious PDF — malware analysis report

Static analysis result for SHA-256 8176013a5eb971fe…

MALICIOUS

PDF

68.8 KB Created: 2021-02-25 06:04:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5c25e8a4c2c8b55845b50cecaf3c3a85 SHA-1: 5f9bea7a00cb01bef108c51d9c01a017fea3cacd SHA-256: 8176013a5eb971fed5f5e1dd1687d257951d923b36f2eb45ffbd57352817ab6e
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://maypoin.ru/wix?keyword=champion+wheelybird+auto-feed+trap+40909 PDF link annotation
    • http://dfahsdfgjsfg.online/securus_contact_informationglhcd.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/gomiwesebegezijudewum.pdfIn PDF document text
    • http://itverys.space/87718607133vmba3.pdfIn PDF document text
    • http://stassikorskyi.com/jenodajifujabaduvajazelabgytk.pdfIn PDF document text
    • http://bebetadiruj.mywebcommunity.org/48688478913.pdfIn PDF document text
    • http://help-nanny.site/lixanizop6ign7.pdfIn PDF document text
    • http://merovew.xyz/sujonijexiloasei.pdfIn PDF document text
    • http://reduslimitalia.website/laxuwebiwuq7vnq.pdfIn PDF document text
    • http://nat-fru.space/736897970032x54k.pdfIn PDF document text
    • http://lnstagram-office.com/samarasimha_reddy_telugu_movie_audio_songsl5otj.pdfIn PDF document text
    • http://genusadnlo.space/gapeburunafajisg2s9.pdfIn PDF document text
    • http://betijeduw.getenjoyment.net/how_to_calibrate_fluke_infrared_thermometer.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/rilexazejuzovep/cute_baby_crying_whatsapp_status_video.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/86154191285.pdfIn PDF document text
    • http://pikubub.onlinewebshop.net/aircraft_maintenance_technician_jobs_canada.pdfIn PDF document text
    • http://xomapagovujux.atwebpages.com/asus_x205ta_upgrade_ssd.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/75465508425.pdfIn PDF document text
    • http://gurabagoderes.atwebpages.com/lujowe.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/bolted_connection_problems.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_off0000cf88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF88 5760 bytes
SHA-256: 5f6d134849a51a55f318ede068d75f4c3a4ab195b690fd91afae23bb9ebd6b5b
font_01_sfnt_off0000e30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30A 10116 bytes
SHA-256: 569f1a000aa4fbfc73fa251b57b58727bc4c97d73d943e754d16675926b3be5d