Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2063a48b0134911…

MALICIOUS

PDF

70.3 KB Created: 2021-03-04 14:51:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84a49de92e2e45468d95124a6666feb4 SHA-1: 8552b87969efa04d598f067d9981666c306f7da6 SHA-256: b2063a48b0134911e498528d29b0c66da48e414033f04d269681f77802198ada
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous embedded URLs, including one pointing to 'bologen.ru', suggesting it's designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the malicious intent by identifying a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/wb?keyword=how%20much%20does%20a%20general%20dentist%20make%20in%20new%20york
    • https://cdn-cms.f-static.net/uploads/4411919/normal_603d30ce9d2bf.pdf
    • http://pepirizibizedel.22web.org/8620109561.pdf
    • https://cdn-cms.f-static.net/uploads/4456377/normal_5fd193507126c.pdf
    • https://cdn-cms.f-static.net/uploads/4451954/normal_600c58c64b88d.pdf
    • http://nibajafij.medianewsonline.com/frozen_jr_script_part_2_-_gibson_county_youth_theatre.pdf
    • https://cdn.sqhk.co/lepagesali/frVYjb8/gagopobalejoduxijuxup.pdf
    • http://zeboxagekej.sportsontheweb.net/how_do_i_use_my_instant_pot_duo_evo_plus.pdf
    • https://cdn.sqhk.co/bipadifudame/heWghbd/lobster_traps_for_sale_craigslist.pdf
    • https://cdn-cms.f-static.net/uploads/4449181/normal_600d27dd2d683.pdf
    • https://cdn-cms.f-static.net/uploads/4478688/normal_5fd93b2c1f0cb.pdf
    • https://cdn.sqhk.co/mivoteloxip/ptifggj/zetidaparof.pdf
    • https://cdn.sqhk.co/kisasizaro/aNTBiaU/euro_2016_manager_free_kick_game.pdf
    • https://static.s123-cdn-static.com/uploads/4481994/normal_5fe2cb7fd1cdc.pdf
    • http://jabisoj.22web.org/star_trek_voyager_timeline_map.pdf
    • https://cdn-cms.f-static.net/uploads/4388412/normal_60258bed08da4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_fd54a7b460d046dc9465f77e78a03aa8.pdf?index=true
    • http://xunonevikonog.rf.gd/gofedibi.pdf
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_5a891850f2494697b53eb387d77711fc.pdf?index=true
    • http://gixiluvigatekij.atwebpages.com/interior_design_sales_jobs_chicago.pdf
    • http://wizuxamop.rf.gd/axon_training_plataforma_virtual.pdf
    • https://8dac4d01-2cd1-45d2-8b5f-6005f802adc9.filesusr.com/ugd/1f96ce_eeb24456a50f428aa90730659d751148.pdf?index=true
    • https://010f2e21-25ca-4560-806d-08cbbb7c7db1.filesusr.com/ugd/74a852_d86b2667e28e43f986eb939427e17908.pdf?index=true
    • http://bumurulepowele.myartsonline.com/ziwalebemepuwujewatofot.pdf
    • https://a1d1c4ac-cf1d-4c58-861c-45d1188f4b60.filesusr.com/ugd/052f3a_07c81c96f0f04ec7a1f785304d3ae0ff.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5d9.bin
e689162563cd88cd2e042f586ac5c8d2e6031c0a047dfe044286afcb01546b12		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D9 5572 bytes
font_01_sfnt_off0000e8b1.bin
080c174c8090c933b3a4b791db9a7c88f071c08968d6789a140ef80f2a0b7fdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B1 10196 bytes

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