Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2c6735e9466b176…

MALICIOUS

PDF

184.6 KB Created: 2021-03-25 06:29:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9146dd1fb506aee4be0dc3566532f72c SHA-1: d1832bd48c1a28a0141a2260289b540c97c1322e SHA-256: b2c6735e9466b1765aff822296e9509d7cc366085e47b4253e08153483889416
126 Risk Score

Malware Insights

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

The PDF file contains numerous links to disposable domains, many of which are configured as link farms. One prominent URL, 'https://seumenha.ru/strik?utm_term=surah+rahman+mp3+download+with+translation', suggests a phishing or malware distribution lure disguised as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://seumenha.ru/strik?utm_term=surah+rahman+mp3+download+with+translation PDF link annotation
    • http://rimowew.22web.org/cengage_publication_chemistry.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489730/normal_6012dea25ee07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410983/normal_600a8262523e2.pdfIn PDF document text
    • https://cdn.sqhk.co/fusozuwalas/HhjAXjg/real_racing_3_apk_mod_unlocked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381081/normal_5fe6e3f382ad1.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/hhiatgh/mud_bogging_events_near_me_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/sevigexew/PgjUiiN/galiroxisekasigiwemuma.pdfIn PDF document text
    • http://gamujop.iblogger.org/best_long_term_survival_food_companies.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461780/normal_605b7e2e18aa7.pdfIn PDF document text
    • http://jatuligirez.22web.org/android_tv_x86_on_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413564/normal_5fce4bfae5ae1.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/kqjRlNV/88040760675.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pajofaliwiwa.rf.gd/52159519953.pdfIn PDF document text
    • http://sexizaju.rf.gd/ccna_security_or_comptia_security.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4986ef7f-e00b-42a7-9c93-4001a96c6c89/widamunerabomade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f6304e2-713b-45b1-b633-07e288c0d99e/understanding_food_principles_and_preparation_amy_brown.pdfIn PDF document text
    • http://bejutamukedus.epizy.com/nuluxifasamijonijoja.pdfIn PDF document text
    • http://wobagelamabix.rf.gd/secretary_of_state_ms_annual_report.pdfIn PDF document text
    • http://semerobaragizeg.epizy.com/circle_theorems_poster.pdfIn PDF document text
    • https://9fb0fece-6c2a-4f8b-8ff1-5d9ea67f5ee7.filesusr.com/ugd/f6a907_c7490a60b9704f0ca6391d7bcbd7794d.pdf?index=trueIn PDF document text
    • http://wetowotupime.rf.gd/les_miserables_storyline_musical.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d2adfba-fc6c-4e84-a634-685e4bd3cfd6/ladadiwivibeno.pdfIn PDF document text
    • http://robefopatobut.epizy.com/480353782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dbd8545-be4a-4128-9cdc-ff91917dd89b/adivina_los_sonidos_de_animales_juego_para_nios.pdfIn PDF document text
    • https://c30b87d5-e38e-4f4c-8f61-e356d9eaafe8.filesusr.com/ugd/347120_199944ebe92e413ebe4a7a8857d9f567.pdf?index=trueIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off00029880.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x29880 33696 bytes
SHA-256: da7ba37a00dfeb2798607462f743e2b95ec8edce6c2bb11bb0028aabebdab656
font_00_sfnt_off00023dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23DD1 1636 bytes
SHA-256: f9a9e4710170d6d2ce92d1a5bf9f7f3279483f675d4bbc4d3d68473e6b6a6b54
font_01_sfnt_off0002460d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2460D 5560 bytes
SHA-256: c827472514b39459a418bc2e6e7bf37f0dcc3f3b7f6762fa1fd03ad5eef40027
font_02_sfnt_off000258cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x258CF 6632 bytes
SHA-256: 80512d45ac8ec8c7bc80d0e1b16207b29514a257e393dde92ce2744527308d7d
font_03_sfnt_off00026dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26DBB 13352 bytes
SHA-256: 0a7129a25425451dca7ef8ab2c2412b70987bee2e6753456684823268b97f737

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