Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa49adc1fc33b2d…

MALICIOUS

PDF

67.5 KB Created: 2021-03-07 18:00:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 04c6df3c7051184fc0a2e4563ee962a5 SHA-1: c3c1975d9e509b4b2ff871af08475652b032251a SHA-256: 2fa49adc1fc33b2da6b4ca5ca9ab111272a7737fa41e85214de30593d72402a9
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 hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous URLs point towards a phishing or malware distribution attempt, likely initiated via spearphishing.

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://pelibifir.ru/wix?keyword=ap+psychology+unit+6+test+pdf PDF link annotation
    • https://cdn.sqhk.co/natokaze/gqicyhb/hocus_pocus_2019_tv_schedule_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/tujuvemevo/jeMgjjK/32_smart_tv_at_costco.pdfIn PDF document text
    • https://cdn.sqhk.co/dajuzafum/ijhbibb/cinemark_piura_peru_cartelera.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/jgjg5jb/29148367445.pdfIn PDF document text
    • http://jokeriz.22web.org/why_does_my_sprinkler_not_rotate.pdfIn PDF document text
    • https://zuxosudeti.weebly.com/uploads/1/3/4/3/134359900/vodalaxuwolab-dodulunaxefe-bikarojoxoz.pdfIn PDF document text
    • https://cdn.sqhk.co/soxobiwefili/idwC5ji/1864403827.pdfIn PDF document text
    • https://cdn.sqhk.co/mexovaru/jbjb0ig/hell_rider_movie_nicolas_cage.pdfIn PDF document text
    • https://bazofaxeretaw.weebly.com/uploads/1/3/4/8/134868688/popevagaguroxub-redetewidi-netudumagena.pdfIn PDF document text
    • https://zevuvizaxetu.weebly.com/uploads/1/3/4/8/134887967/129e4063334d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://derajina.rf.gd/how_much_does_international_delivery_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/kesekijuti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2380fa44-1057-4621-af0b-ca3034af1cca/marlin_336_scope_rail.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/difeferewuwabiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/099c70f1-eb3d-41dd-8d3b-58de5e90e6aa/lomerotikakad.pdfIn PDF document text
    • http://zafokofebub.epizy.com/the_secret_teachings_of_all_ages_1928.pdfIn PDF document text
    • http://vozefure.rf.gd/frostpunk_the_refugees_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/48478692761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e95413b2-c9ee-4f43-b8de-9ccf8f4232ab/bitadoditoz.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_off0000ca5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA5D 5356 bytes
SHA-256: 35567b3e823a080185e7b390899853a605de609bf526b473afc38aa47eaa6d01
font_01_sfnt_off0000dca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA8 9964 bytes
SHA-256: 9d58f5bb474b45fab2e9e20511e61ec95f7f54841a566d6b693fda10927522e9

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