Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b602163a597f69…

MALICIOUS

PDF

68.6 KB Created: 2021-03-26 18:39:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 92fd9c43165dd699dd56dfa37bc1aef6 SHA-1: 556a3d7e0e021c396935925c7aa91f6efce90552 SHA-256: c0b602163a597f69f2c57e9ff4239ca97fdd72170cd4286c94112786f074617d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with several pointing to domains associated with link farms and disposable hosting, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document's structure as a link farm on disposable hosting, reinforcing the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://nipisod.ru/wix?keyword=plymouth+parks+and+rec+nh PDF link annotation
    • http://milesatel.mygamesonline.org/34852998177.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/LTzjfhd/gokafuwe.pdfIn PDF document text
    • https://libirobu.weebly.com/uploads/1/3/5/3/135336219/9055962.pdfIn PDF document text
    • https://cdn.sqhk.co/gojinuma/Dshegf1/raid_ant_bait_dog_chewed.pdfIn PDF document text
    • https://cdn.sqhk.co/pimibopugugo/gMcibl5/hitman_2_golden_handshake_poison_vodka.pdfIn PDF document text
    • http://natikolom.site/kenamuzetebafimegamtvv2j.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://nazorizuz.medianewsonline.com/what_to_say_to_a_woman_diagnosed_with_breast_cancer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464877/normal_601364ad19f1c.pdfIn PDF document text
    • http://qunit.space/timed_up_and_go_testn6pgs.pdfIn PDF document text
    • http://berozava.iblogger.org/wolegororalip.pdfIn PDF document text
    • https://lojamagimom.weebly.com/uploads/1/3/0/9/130969840/c84597511eb9a.pdfIn PDF document text
    • https://zutosexumapa.weebly.com/uploads/1/3/1/6/131606298/2430762.pdfIn PDF document text
    • http://legalvictory.group/zawowuparusiresojevolitufvbt55.pdfIn PDF document text
    • http://wutanumijejol.sportsontheweb.net/assessment_evaluation_in_higher_education.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457582/normal_602b9efaadcea.pdfIn PDF document text
    • https://sajakuvidosub.weebly.com/uploads/1/3/4/4/134496924/vidiwutaruxuxe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456671/normal_600100cb0d771.pdfIn PDF document text
    • https://cdn.sqhk.co/notudubugu/hihdjaq/wish_list_app_for_families.pdfIn PDF document text
    • http://present-mag.ru/poblano_pepper_plants_near_meuvxzz.pdfIn PDF document text
    • https://menolalosixoj.weebly.com/uploads/1/3/4/7/134714047/5af250ce863.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rogofijanititad.epizy.com/luloxoruwobazi.pdfIn PDF document text
    • http://lirufuti.epizy.com/69276012405.pdfIn PDF document text
    • http://vaxomuterok.epizy.com/vanapezexorateziwogesa.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_off0000cc4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4C 5480 bytes
SHA-256: 9cbb89893a90e5423d1a9a6793ffca9f437ad82f90d5c823a11a08b793aad326
font_01_sfnt_off0000dec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC3 11568 bytes
SHA-256: 793ac2f6caf4322851047999e7ca78791a4aacf619543275ebf98e7946030f9a

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