Malicious PDF — malware analysis report

Static analysis result for SHA-256 9db9f0e76347aa93…

MALICIOUS

PDF

85.9 KB Created: 2021-06-02 09:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0a22a8611941b2bd8a8074f062405a59 SHA-1: bc018367dccd30af409846841d44c154f915724b SHA-256: 9db9f0e76347aa93c299493085a1eee9ecf21e6af1b36c48766ea3499202b138
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as a phishing trojan. The embedded URLs are likely used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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 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://garglob.ru/pbw?utm_term=tere+bin+nahi+jeena+mar+jana+dholna+mp3+download+dj PDF link annotation
    • https://pobowapikojuga.weebly.com/uploads/1/3/4/9/134903403/rupovixobavizuzam.pdfIn PDF document text
    • https://ladetizor.weebly.com/uploads/1/3/4/7/134731735/d791fe20cbef0.pdfIn PDF document text
    • https://fogakorix.weebly.com/uploads/1/3/3/9/133997140/8b7a843785d197.pdfIn PDF document text
    • https://mixajogidevo.weebly.com/uploads/1/3/0/9/130969427/logobigeluwabazari.pdfIn PDF document text
    • https://fewaxozane.weebly.com/uploads/1/3/4/3/134341296/semediveju_gunazokafik_pukowalel_fesan.pdfIn PDF document text
    • https://jofetafoba.weebly.com/uploads/1/3/4/4/134485710/36baa86a4.pdfIn PDF document text
    • https://seborokib.weebly.com/uploads/1/3/4/0/134096410/958841ff415.pdfIn PDF document text
    • https://tixiganotirof.weebly.com/uploads/1/3/1/1/131163533/191860.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://kukepofarit.pbworks.com/w/file/fetch/144445785/15589312209.pdfIn PDF document text
    • http://nadupodifado.pbworks.com/w/file/fetch/144466308/zedadibizinerodomawob.pdfIn PDF document text
    • http://wusagem.pbworks.com/w/file/fetch/144472503/94419226109.pdfIn PDF document text
    • http://natizasex.pbworks.com/w/file/fetch/144419883/geguwebonuzexapirazosul.pdfIn PDF document text
    • http://ronuzexem.pbworks.com/w/file/fetch/144427683/goblin_cap_1_espaol_latino_descargar.pdfIn PDF document text
    • http://jolowajuwijo.pbworks.com/f/35298664733.pdfIn PDF document text
    • http://joxupakager.pbworks.com/w/file/fetch/144489321/bakery_story_hack_mod_apk.pdfIn PDF document text
    • http://xiwitanul.pbworks.com/f/indirect_to_direct_speech_worksheets_with_answers.pdfIn PDF document text
    • http://jotoxipigi.pbworks.com/w/file/fetch/144455022/81444328284.pdfIn PDF document text
    • http://luwapoveduvi.pbworks.com/w/file/fetch/144485097/baml_bamsz_deiken_rnekleri_aratrma_yntemleri.pdfIn PDF document text
    • http://liwuvedesisu.pbworks.com/w/file/fetch/144483360/zesekidovoxid.pdfIn PDF document text
    • http://guronavageba.pbworks.com/w/file/fetch/144489282/30897327632.pdfIn PDF document text
    • http://pimepovume.pbworks.com/w/file/fetch/144480657/bricks_vs_balls_breaker_mod_apk_unlimited_money.pdfIn PDF document text
    • http://genarozep.pbworks.com/f/what_ps5_bundles_will_there_be.pdfIn PDF document text
    • http://vimadutukad.pbworks.com/w/file/fetch/144474096/39629580877.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e74f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74F 5440 bytes
SHA-256: b0809a7c5325c78b6f4ad2240adcef0630b0ee458aac2aa1d5cb5f9aa8f60590
font_01_sfnt_off0000f9b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B3 12164 bytes
SHA-256: 6d15a1c7e72b61e04aefd5d290c6868def93b4d5e7d87b08e41f71aab6b3fd3c
font_02_sfnt_off00012175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12175 16824 bytes
SHA-256: a8dd2438c3335e3e4b8ceb655ad2d080a5c94fcbabdaaacbec511a048e74689a
font_03_sfnt_off00013926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13926 4300 bytes
SHA-256: e9af18bc87a9e7e8bc03fbd343023e5c26bba3f15d3b649583ed03e8388b492a