Malicious PDF — malware analysis report

Static analysis result for SHA-256 63e6138f2f6c8db7…

MALICIOUS

PDF

94.3 KB Created: 2021-03-18 16:49:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea5ec327e10ce4dcffcfa26d5f4134cc SHA-1: d45d39886e4c2d37bfe82b533539f6b91eb50856 SHA-256: 63e6138f2f6c8db7809c8161715ee00a8f55992e56a5635c60ead1156145e0c9
96 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'bologen.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a "Hasselblad lens repair manual", aligning with common social engineering tactics used in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=hasselblad+lens+repair+manual
    • https://static.s123-cdn-static.com/uploads/4471692/normal_5fe33ab24b8e7.pdf
    • https://static.s123-cdn-static.com/uploads/4387036/normal_5fe2ba1033c2a.pdf
    • https://static.s123-cdn-static.com/uploads/4449411/normal_5fdd7e0f2d27b.pdf
    • https://cdn-cms.f-static.net/uploads/4386076/normal_604f62f55bb7a.pdf
    • http://roselosudeve.sportsontheweb.net/sujelowag.pdf
    • https://cdn.sqhk.co/lewivapawo/ic9bKif/miroclash_apk_ios.pdf
    • https://cdn.sqhk.co/zebasama/ihgiaic/zawudusurazexakutetelin.pdf
    • https://cdn.sqhk.co/zevivovakok/gOshce7/buyers_guide_waupaca.pdf
    • https://static.s123-cdn-static.com/uploads/4381964/normal_5ffb8642ed039.pdf
    • https://cdn-cms.f-static.net/uploads/4418575/normal_5fd9188518cc2.pdf
    • https://cdn-cms.f-static.net/uploads/4446638/normal_604eeff963d3d.pdf
    • https://cdn-cms.f-static.net/uploads/4376625/normal_6048456865778.pdf
    • https://cdn.sqhk.co/pulovafafita/dic2msM/27374262218.pdf
    • https://cdn-cms.f-static.net/uploads/4369760/normal_603bb652cd197.pdf
    • http://nufemewi.iblogger.org/neoplasia_maligna_de_colon.pdf
    • http://dajexori.mypressonline.com/66998457991.pdf
    • http://zemesod.getenjoyment.net/72000584793.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cf268418-7549-4780-9cff-e39e61b5276c.filesusr.com/ugd/0b1cf2_06b5351c3c0845aa997ec154be8bcab5.pdf?index=true
    • https://e31b828f-dd5d-4b35-abba-5777d5fc2ed6.filesusr.com/ugd/56a8cc_f05c43718ddf49809102e9522d64fd86.pdf?index=true
    • http://mofemofosaxi.rf.gd/anthropocentrism_vs_ecocentrism.pdf
    • http://xowobovu.myartsonline.com/analytical_geometry_3d_vector_calculus.pdf
    • http://zekarevuwo.epizy.com/ben_ten_alien_force_movie.pdf
    • http://dijuvunote.onlinewebshop.net/65052395006.pdf
    • https://0e098354-e5d1-4afc-9be7-763a70ae5e44.filesusr.com/ugd/ef253e_3396125579204467aea2a75ee7a09a2c.pdf?index=true
    • http://bikoguxutova.rf.gd/libudopolabinifazatoro.pdf
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00014282.bin
957355c08eea5eb9a5a0464226a1ce6ba4254160f44917fdd0d2d9f70374bc20		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14282 23304 bytes
font_00_sfnt_off00010b50.bin
3b4c9774c2b6c49da8304f80de0d6a8905002684d6eb011c58ffed1bca891e1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B50 5208 bytes
font_01_sfnt_off00011cda.bin
438758d33bebba2788edad3d47c06b5d3600954223e766b8b7e56f5a3019c032		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CDA 10988 bytes

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