Malicious PDF — malware analysis report

Static analysis result for SHA-256 e609208b68671237…

MALICIOUS

PDF

87.0 KB Created: 2021-04-07 00:10:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9f766a3000b76c6dd793546b52558bed SHA-1: 12c6dc4faf26a7a40000e5649c80fd220cd6d40c SHA-256: e609208b68671237373775f2a053afc9f863bb7eabd415daa56e04a8a373e5e5
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 0.9967

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://vilenefex.ru/strik?utm_term=battery+tender+3a+battery+charger+and+maintainer PDF link annotation
    • http://ru-1.casa/tutuboqcgp.pdfIn PDF document text
    • http://getporte.xyz/wings_of_fire_book_15_povi8xwq.pdfIn PDF document text
    • http://ostanni.fun/material_safety_data_sheet_of_sodium_hydroxideopnk4.pdfIn PDF document text
    • https://sekepavikaforo.weebly.com/uploads/1/3/4/6/134608196/c272652.pdfIn PDF document text
    • http://nudistoff.club/how_to_use_sunbeam_mixer_dough_hooke5wqv.pdfIn PDF document text
    • http://cenderaoriginator.com/mumotoruzalofipixuzav0k7r.pdfIn PDF document text
    • https://texifafotolatip.weebly.com/uploads/1/3/4/7/134764930/pogeran.pdfIn PDF document text
    • https://digeforoxega.weebly.com/uploads/1/3/4/6/134668277/1993768.pdfIn PDF document text
    • http://f1l3download.site/14821205195d9490.pdfIn PDF document text
    • https://jufufowepum.weebly.com/uploads/1/3/5/3/135348100/17c4c57.pdfIn PDF document text
    • https://funebaxap.weebly.com/uploads/1/3/4/3/134399245/motok_romog_jumewavu_pagamowisi.pdfIn PDF document text
    • http://reawolt.online/guns_n_glory_mod_moneysxivr.pdfIn PDF document text
    • http://biomaniix.website/geduz2a5ao.pdfIn PDF document text
    • https://cdn.sqhk.co/dovawowo/iHih95W/united_nations_sustainable_development_goals_2015.pdfIn PDF document text
    • http://mini-cam2.club/princeton_apush_review_book_2020s8pit.pdfIn PDF document text
    • https://cdn.sqhk.co/retesixabe/haigVhg/microsoft_to_do_list_app_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/jivomawufem/gijgggh/zezajakarufewupupemanip.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/jdhggf6/98263264981.pdfIn PDF document text
    • http://voiprormul.xyz/how_do_you_read_a_stock_reportihso7.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/muxozuvalubi/62722790070.pdfIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_307ff2b24f1b4403b9dd060f69f012db.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/searchs_on_ipad.pdfIn PDF document text
    • https://84d51d8d-5932-465a-b044-5d36dace581c.filesusr.com/ugd/98e2de_2bf41b0be65c4457b1c67c52cf1d9f9f.pdf?index=trueIn PDF document text
    • https://41c240d9-b4af-4f88-8fa4-2a41cce3a287.filesusr.com/ugd/01bc73_e00a974ad6c64f438f3551f95b69ba38.pdf?index=trueIn PDF document text
    • https://8488b7ac-84bc-45ae-88ed-26841205fc59.filesusr.com/ugd/7cda3c_b55c5a6e2e9b4de091562e8e21f6e4de.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lulelepese/xaperoli.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/cv_template_illustrator_free.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/how_to_clean_electric_stove_top_drip_pans.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_off000114c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C5 5600 bytes
SHA-256: 3980f5496db2d8c2288e83835d08bb7659db8785b4e9c4f738c2fa23a766a1f8
font_01_sfnt_off000127ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127AC 11264 bytes
SHA-256: 8b536916f7fe28a859ecabf847caf5020f11e97744c704f450345a1df43e783b