Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a2008a307fbcb5b…

MALICIOUS

PDF

80.0 KB Created: 2021-03-23 18:43:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6117eea410f62868f0677e8e4345898f SHA-1: 56d579de6a84b25555de1c75bdb91b00104ce571 SHA-256: 5a2008a307fbcb5b1f28b277bac4c04c9d6e38f899f589246d8c37a1268cbaa0
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 0.9998

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://zajinet.ru/wix?keyword=laplace+transform+table+with+roc PDF link annotation
    • https://cdn.sqhk.co/nuvexajamu/bwF0ohe/shellac_nails_near_me_cheap.pdfIn PDF document text
    • http://komarovskii.xyz/tesobutajoxiwufuwejsn7h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486982/normal_60184da885abd.pdfIn PDF document text
    • https://cdn.sqhk.co/jatobeguji/7jfdjdH/44499476472.pdfIn PDF document text
    • https://cdn.sqhk.co/baxemazisod/ehhfhbs/download_mutant_genetic_gladiator_mod_apk_android_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445880/normal_6058f8377de85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382187/normal_60500ac8dfcde.pdfIn PDF document text
    • http://tiluvopira.medianewsonline.com/80637331573.pdfIn PDF document text
    • http://my-favshope.online/admissibility_of_computer_generated_evidence4shu5.pdfIn PDF document text
    • https://cdn.sqhk.co/vovidonob/QQvgfji/ananya_agarwal_photos.pdfIn PDF document text
    • http://2020coupons.info/jupixgrktt.pdfIn PDF document text
    • https://cdn.sqhk.co/zutijujes/dgjgp8Z/13346915135.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375095/normal_5fe5703983e47.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzudumijamo/Lo1jhrJ/83747907289.pdfIn PDF document text
    • https://cdn.sqhk.co/pimupigedu/gihLMyF/jiserakuvagidatutedijig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/13fb4619-2245-403b-a259-72004523472c/figorifuva.pdfIn PDF document text
    • http://mojogoralil.onlinewebshop.net/how_to_cancel_alarm_casio_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/151d401f-9f5e-4d60-b644-90803851eeae/organic_chemistry_2_cheat_sheet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e20c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20C 5428 bytes
SHA-256: 79e75041cf1ca95a469d5f61ee0d071881258204d9a0d3abf7eec656f338da7c
font_01_sfnt_off0000f469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF469 12076 bytes
SHA-256: 21e7baca82336e5a2c2291882906274623507ed4dc3fbde774f4d2a10805bb7b
font_02_sfnt_off00011e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E08 16064 bytes
SHA-256: a12e1470c7ae925daad548a12934703a3a60fb09a822252cc73ba90359afbd61

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