Malicious PDF — malware analysis report

Static analysis result for SHA-256 67c6c032d95fcceb…

MALICIOUS

PDF

136.8 KB Created: 2021-03-09 11:45:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 9a245b594ded0f02aaefcc357ba9b5e1 SHA-1: 2d335b89ae6a81c6e59b0e0a60cc1a93bac19430 SHA-256: 67c6c032d95fcceb87cd2f407672f94187e8279e19ee12f9b6454bd4b93efa0d
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The document's structure as a link farm on disposable hosting, combined with the presence of numerous URLs, strongly suggests a phishing or malware distribution attempt. The ML classifier also provided a very high score, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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/aws?utm_term=what+is+the+latin+word+for+law In PDF document text
    • http://policyhelpcenter.com/cloud_9_full_movie_disney_channel_original_movieulf5l.pdfIn PDF document text
    • https://wikifepum.weebly.com/uploads/1/3/3/9/133986434/9888773.pdfIn PDF document text
    • http://1-bog.ru/xolivis04s8e.pdfIn PDF document text
    • https://mesajenijapab.weebly.com/uploads/1/3/0/9/130969967/zowetagarekow-rozabe-wiwotinelovod-demem.pdfIn PDF document text
    • https://guzokilib.weebly.com/uploads/1/3/2/7/132741743/2270719.pdfIn PDF document text
    • http://lisolu.org/digital_middle_school_books_about_race18myd.pdfIn PDF document text
    • https://falojaba.weebly.com/uploads/1/3/0/7/130776150/1687134.pdfIn PDF document text
    • https://pebepatesova.weebly.com/uploads/1/3/4/4/134447190/zapav.pdfIn PDF document text
    • https://fugikoji.weebly.com/uploads/1/3/4/6/134611078/c7303.pdfIn PDF document text
    • http://lidzadva.xyz/nejosibuvissw7sr.pdfIn PDF document text
    • https://zetaxufonepijak.weebly.com/uploads/1/3/4/3/134353616/c7de2773897da0.pdfIn PDF document text
    • http://org-fruit.space/percy_jackson_the_last_olympian_book_online_freey6hj9.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/0acc86d3-695f-4071-88e9-df10dc18d85d/how_to_reset_a_maytag_refrigerator.pdfIn PDF document text
    • http://pusukobu.epizy.com/lidape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a32b0865-47b6-4659-a39c-5507e328bfc0/javilosoruwarokukolobafer.pdfIn PDF document text
    • http://xirotowukutizu.epizy.com/wen_56203i_super_quiet_2000-watt_portable_inverter_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/87318504006.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/nezefemokaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/465ed1ee-1069-43ce-b10f-c526e8f2de3f/where_is_truist_located.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/algorithms_for_optimization_the_mit_press.pdfIn PDF document text
    • http://jorowoti.epizy.com/ramitunawosevugedopavan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a65b6de0-30cf-4013-8144-c58f0b3cc5df/jason_and_the_golden_fleece_apollonius_of_rhodes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4c625cb-d386-4470-8dd8-bfd036a61f21/79782201169.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_off0001d757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D757 5100 bytes
SHA-256: 407e2d262b11e9c99b2ecf91f6d7c0350f4ae0423de1e2f8404299318d40e845
font_01_sfnt_off0001e8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E8BF 13360 bytes
SHA-256: 3917b7c3667f1e814fa67c87f6051404b7d5637e55081ac0466c9979129722db