Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f06441d62033f0…

MALICIOUS

PDF

79.2 KB Created: 2021-02-21 23:03:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6216a06919405bd98fa18d445e163d8a SHA-1: 48d2194fd1fad601a50e89a13fe2fb0ad25af19f SHA-256: e5f06441d62033f0dfa1863b466fcf66c258e6763b02515e553289847e85d579
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to distribute further malware or phishing content. The embedded URLs and the nature of the link farm point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/strik?utm_term=high+dps+hunter+build+destiny+2 PDF link annotation
    • https://nililuwuta.weebly.com/uploads/1/3/0/7/130775375/xadanopirozirili.pdfIn PDF document text
    • https://xisiwazebisa.weebly.com/uploads/1/3/4/7/134758569/80f3b178e5b.pdfIn PDF document text
    • https://cdn.sqhk.co/tudobele/fjehemt/pet_population_by_country.pdfIn PDF document text
    • https://bipikive.weebly.com/uploads/1/3/4/3/134342269/damafuxizina_pikib.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/fjjCu4W/mad_skills_motocross_2_mod_apk_free_download.pdfIn PDF document text
    • https://ponefapu.weebly.com/uploads/1/3/1/6/131637257/55d8336f8ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386613/normal_5ff119a35ad22.pdfIn PDF document text
    • https://sepiximefajo.weebly.com/uploads/1/3/4/8/134849953/806342.pdfIn PDF document text
    • https://cdn.sqhk.co/badiboxa/jbjZkhg/4x4_off_road_rally_4_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nalawanuxa/IOJnBjj/7746002133.pdfIn PDF document text
    • https://cdn.sqhk.co/dewozoju/jihhhbh/bijozugededixi.pdfIn PDF document text
    • http://natural-shop.info/gujevizoseguwekoth8t4.pdfIn PDF document text
    • https://cdn.sqhk.co/nogegamapagi/cjj85hj/49293237583.pdfIn PDF document text
    • http://ourfanz.com/jokamabezofiruno5e6gi.pdfIn PDF document text
    • http://tanuwoxomasosog.22web.org/asvab_study_guide_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408853/normal_5fec96ef02221.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mizebonemis.rf.gd/report_writing_on_flood_situation_in_kerala.pdfIn PDF document text
    • http://nuzavaxevarap.epizy.com/bikuzafuxakawixa.pdfIn PDF document text
    • http://jimeroxivekafos.epizy.com/zukuxa.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF945 5348 bytes
SHA-256: 1407f40f4a06cf0f1138fa50b73873fa3413ee491828629aeb0f72d117bcc165
font_01_sfnt_off00010b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B76 10528 bytes
SHA-256: 36a54d09bfcb6f5924dd5c6ed56ef4b34dc02acc9a873ddfb0dacf477a4173be

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