Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd7decaf11ae98ea…

MALICIOUS

PDF

74.4 KB Created: 2021-05-16 10:06:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7f84118374c809b0c23d0aed7138a050 SHA-1: 0552abcc487e70f782e3a5eed962b66816ef7e7b SHA-256: fd7decaf11ae98ea69884bdd0ae0180305fef6173e7d97970e3705c947d2c90c
126 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, identified as a link farm. The primary URL, https://xajibur.ru/strik?utm_term=miller+bobcat+225+will+not+start, suggests a lure related to equipment issues, likely to direct users to potentially malicious content or for SEO manipulation. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of harmful intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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://xajibur.ru/strik?utm_term=miller+bobcat+225+will+not+start PDF link annotation
    • https://tariwina.weebly.com/uploads/1/3/0/7/130739483/kilikuj_nekaxukewino_goxumoma_ledixovojuto.pdfIn PDF document text
    • https://gavizixuf.weebly.com/uploads/1/3/5/3/135334805/d2025d9828.pdfIn PDF document text
    • https://kinigapiluxuke.weebly.com/uploads/1/3/4/8/134863840/b172e80e7.pdfIn PDF document text
    • https://loxajutuwaguxi.weebly.com/uploads/1/3/2/6/132681393/ed85fcf4d10.pdfIn PDF document text
    • https://cdn.sqhk.co/zisafebu/dgcjihd/ziviwotujasusi.pdfIn PDF document text
    • https://cdn.sqhk.co/ludukuni/lkhahcl/chocolaterie_jean_trogneux_brigitte_macron.pdfIn PDF document text
    • https://minebetedobipas.weebly.com/uploads/1/3/2/6/132696067/jitaf.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/oWiiQp2/pekonerododokikemimaramo.pdfIn PDF document text
    • https://cdn.sqhk.co/jutigurotow/aigJtgg/aplikasi_adblock_plus_android.pdfIn PDF document text
    • https://zunudomulu.weebly.com/uploads/1/3/4/6/134604261/vetasugebixefos.pdfIn PDF document text
    • https://cdn.sqhk.co/vikafaselida/gjsAWY2/clash_of_clans_miner_attack_strategy_th11.pdfIn PDF document text
    • https://bevazamosip.weebly.com/uploads/1/3/5/3/135345421/3543912.pdfIn PDF document text
    • https://nemaxololele.weebly.com/uploads/1/3/5/3/135304154/jazelovanofa_xonetakiduge_gewan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f2943e8a-b62b-443f-8ad3-767108183b05/zosixozizogizegifazufop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/046099b6-9a2c-4521-a3fe-d44ea0b0693d/76338305667.pdfIn PDF document text
    • http://mesobuze.epizy.com/2370335132.pdfIn PDF document text
    • http://gawowupakifofe.rf.gd/88127274471.pdfIn PDF document text
    • http://dumudolaba.epizy.com/dofujemazutev.pdfIn PDF document text
    • https://4a39c6c9-989b-4d11-b2d8-cc0becc7f193.filesusr.com/ugd/ef0078_84a10ddc0b9345d1a7b9c0dc1c8cfef1.pdf?index=trueIn PDF document text
    • https://c1bbde11-5cda-4f7c-8b74-b2fe90b484f5.filesusr.com/ugd/1c8c6c_395ad07f0feb44d2849acbfc52245f1a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/40d75857-3232-4c89-a23a-b99229240917/how_to_compare_cost_of_living_index.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cfefc6c-f3d8-4edf-8ff6-5cf307ad10d5/personal_theoretical_framework_for_advanced_practice_nursing.pdfIn PDF document text
    • http://bevonox.epizy.com/90143393399.pdfIn PDF document text
    • http://tezebidurob.epizy.com/slider_revolution_templates_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD830 5072 bytes
SHA-256: 4a32c474f74f799f8969faa4e2034ebfa48463d3d6117d57a1bfacae2c499f46
font_01_sfnt_off0000e98e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98E 10692 bytes
SHA-256: 7e5132a6f802d10e855113ffedea665fa17d0aa68c1bf852d5c2ffcc5a17920b
font_02_sfnt_off00010df8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF8 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361