Malicious PDF — malware analysis report

Static analysis result for SHA-256 19167bbca40258df…

MALICIOUS

PDF

75.6 KB Created: 2021-03-05 18:07:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 5b96369a116c5c26905a5629f73562f1 SHA-1: 0be44ce9c8c136d5945410854fa84ca13c183a41 SHA-256: 19167bbca40258dfd4fc1b35dd70b99629805d999ba79920ed1328015c28ff1f
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious sites. The primary external URI points to 'https://nipisod.ru/strik?utm_term=focusrite+scarlett+2i2+output+to+amp', which is likely part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=focusrite+scarlett+2i2+output+to+amp PDF link annotation
    • https://cdn.sqhk.co/jotapepikota/hjjGyhd/waves_tuner_for_sale.pdfIn PDF document text
    • https://xagufiwukana.weebly.com/uploads/1/3/4/6/134694649/3906942.pdfIn PDF document text
    • https://cdn.sqhk.co/wozejodes/gdihVgi/tf2_vintage_alien_swarm_parasite.pdfIn PDF document text
    • https://mufanujirube.weebly.com/uploads/1/3/5/3/135348440/lawep-zebunefozekur.pdfIn PDF document text
    • http://bidumowot.22web.org/filme_horizonte_perdido_1973_dublado.pdfIn PDF document text
    • https://gedodigu.weebly.com/uploads/1/3/5/3/135312539/1491723.pdfIn PDF document text
    • https://gapefupekud.weebly.com/uploads/1/3/1/8/131871489/moragukevirusuwo.pdfIn PDF document text
    • http://pejokepi.mywebcommunity.org/how_much_do_doctors_in_the_er_make.pdfIn PDF document text
    • http://bozifosituv.iblogger.org/gears_5_collectible_guide.pdfIn PDF document text
    • https://teligodinawam.weebly.com/uploads/1/3/4/4/134457670/1ca7627e164f2.pdfIn PDF document text
    • https://cdn.sqhk.co/zodozane/Sih7gfV/car_mechanic_school_nyc.pdfIn PDF document text
    • https://bezesigut.weebly.com/uploads/1/3/2/6/132681157/newumil.pdfIn PDF document text
    • http://wetiludivarag.scienceontheweb.net/tumolafulidegar.pdfIn PDF document text
    • http://fopokigife.mywebcommunity.org/29880240060.pdfIn PDF document text
    • https://bulipegorevuju.weebly.com/uploads/1/3/4/7/134700868/zivaj-dilenobivid-tozerijakaxi-mafus.pdfIn PDF document text
    • http://doluridibulif.iblogger.org/xitutebeboware.pdfIn PDF document text
    • https://wuxelulomevadi.weebly.com/uploads/1/3/4/9/134904547/62244.pdfIn PDF document text
    • https://cdn.sqhk.co/wexufenu/dt4hbbu/game_of_sultans_empire_power_calculator.pdfIn PDF document text
    • https://cdn.sqhk.co/kubarevopew/iiLVlhe/nukipi.pdfIn PDF document text
    • https://juzudibat.weebly.com/uploads/1/3/4/3/134328144/4f36720bd3cc68.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f6edc23-f80e-49ee-9301-2fef007c867b/50600890522.pdfIn PDF document text
    • http://pezomovororiz.rf.gd/men_s_health_fall_fashion_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1be2e867-492f-4d5b-a554-b3fb73fe2b11/mufikemidubegifegekunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22ef8f8a-a316-48e7-ae94-faea6c66aff2/55851776610.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_off0000ea1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1A 5168 bytes
SHA-256: 5d2cbb87b7fd396546687ff84a75f23923e1d00c1bd52f3b5cfc425ce22dc565
font_01_sfnt_off0000fb9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9A 10956 bytes
SHA-256: ddc20859bd8a3b7bdf0f64e747370984781a1eb390024fcc7debef91d98f5065