Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ffbe694477f4c19…

MALICIOUS

PDF

74.4 KB Created: 2021-06-10 20:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3cbcf81cd1dd2af2b857b51dfcb7b25e SHA-1: 8bc934faed06b314aae0a99e54791d5bb580aa4d SHA-256: 7ffbe694477f4c19379d7f976712af65f5eaeea67db532908c401e28d37a1899
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, forming a link farm. The primary external URI points to a URL that includes 'utm_term=telugu+story+books+online+reading', suggesting a lure to attract users interested in such content. The overall structure and numerous links point towards an attempt to redirect users to potentially malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://philabc.ru/pbw?utm_term=telugu+story+books+online+reading PDF link annotation
    • https://disuterobusubu.weebly.com/uploads/1/3/5/3/135305861/ed5956c94ec.pdfIn PDF document text
    • https://jodulimije.weebly.com/uploads/1/3/4/7/134732884/8044104.pdfIn PDF document text
    • https://kilejotiwig.weebly.com/uploads/1/3/1/4/131406519/a412090f703.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386613/normal_6044a0bd6ceb1.pdfIn PDF document text
    • https://zoziwaxixu.weebly.com/uploads/1/3/5/3/135316133/dikameletowuso-xusezosonozuv-semupav.pdfIn PDF document text
    • https://xuzomavarek.weebly.com/uploads/1/3/1/3/131383242/4194970.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506063/normal_5fd91165c5f65.pdfIn PDF document text
    • https://novifabapidujup.weebly.com/uploads/1/3/5/9/135975767/suwobovusu-mizokepidekutu.pdfIn PDF document text
    • https://bamebifubakuta.weebly.com/uploads/1/3/1/4/131408159/aedd0e09.pdfIn PDF document text
    • https://wopaxosidavi.weebly.com/uploads/1/3/4/7/134732603/4226592.pdfIn PDF document text
    • https://metiwefipit.weebly.com/uploads/1/3/1/4/131406934/zinesedojavi-juxisebido-nusiwelusegur.pdfIn PDF document text
    • https://mebiwabubeneven.weebly.com/uploads/1/3/1/8/131871414/padixo_gutolij.pdfIn PDF document text
    • https://xoxatazafej.weebly.com/uploads/1/3/4/8/134861408/2e5c03f8f71121.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455902/normal_602fc4fdefd08.pdfIn PDF document text
    • https://wubobuxidozexe.weebly.com/uploads/1/3/4/3/134322977/e4d4c6a17.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muzurinugaw.pbworks.com/f/wapubil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84f13c63-459c-46b3-b5bc-a8489009f3cd/how_to_get_ten_silver_coins_in_geometry_dash.pdfIn PDF document text
    • http://bopidix.pbworks.com/w/file/fetch/144866082/cooking_fever_hack_unlimited_gems_and_coins_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06790000-6d60-47a1-ba5e-f2becaec6535/16406475969.pdfIn PDF document text
    • http://fuxotatizexu.pbworks.com/w/file/fetch/144659601/71392932989.pdfIn PDF document text
    • http://tazijebep.pbworks.com/f/xajupegebosemimuke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd5eb0e4-961c-4cdd-9149-9c58807b9d04/catholic_bible_download_for_ipad.pdfIn PDF document text
    • http://zemenifinabe.pbworks.com/w/file/fetch/144574038/things_to_do_in_rhodes_rdr2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d14b6b31-f243-4b57-8be7-bb361b817bf6/old_school_cars_for_sale_near_me.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_off0000e79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79D 5248 bytes
SHA-256: 02c773cb5b1c8ba9b93c198d4a97346b5578f85f2028160ca0754dad251ed88b
font_01_sfnt_off0000f992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF992 10328 bytes
SHA-256: 0cf32e1f0f6d3587f951968b85a71a76f55f2a2212fb90eb47bfa9246bbb8bab