Malicious PDF — malware analysis report

Static analysis result for SHA-256 076c18771f22ee47…

MALICIOUS

PDF

72.8 KB Created: 2021-02-20 06:44:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9f02f376f10ecd1e6987851cacd0e5d4 SHA-1: 573e9c07ea4ae2936daf61eec598b19ffe9958a4 SHA-256: 076c18771f22ee473d0733d8bc459a51c169f92cc05c35f7f759ec79ef1f225f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains or link farms, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this. The ClamAV detection and ML classifier further confirm its malicious nature. While no scripts were explicitly extracted, the presence of external URIs and the nature of the heuristics point towards a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://baarspo.ru/strik?utm_term=allen+and+heath+gl2400+power+supply PDF link annotation
    • https://cdn.sqhk.co/rolaravez/migPAjh/83247651777.pdfIn PDF document text
    • https://cdn.sqhk.co/kogeledewafo/hfZhfhc/war_wind_heroes.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/cliijgd/70104400712.pdfIn PDF document text
    • http://detonic-deutschland.website/Diagramm_des_Abzugs_nach_Abschnitt_8cujrs.pdfIn PDF document text
    • https://cdn.sqhk.co/papusabefo/h9nghfZ/damawajixivutirojatig.pdfIn PDF document text
    • https://cdn.sqhk.co/molipigi/fedyjj8/ziguzerenavulitumatijekuz.pdfIn PDF document text
    • http://aycotoro7.xyz/authorised_letter_format_for_gstz0r4j.pdfIn PDF document text
    • https://cdn.sqhk.co/sulugedako/EthcSih/65967448169.pdfIn PDF document text
    • https://cdn.sqhk.co/visobipibe/ehbiiIM/50640756867.pdfIn PDF document text
    • http://stc-l.ru/dino_squad_tps_dinosaur_shooter_mod_apk7aszj.pdfIn PDF document text
    • https://cdn.sqhk.co/gixeruxa/3EhjBjh/48161290325.pdfIn PDF document text
    • https://cdn.sqhk.co/dejijadu/Sjgfjin/mowimavawuzigudizigu.pdfIn PDF document text
    • https://cdn.sqhk.co/tedalome/d57oArE/ejen_ali_emergency_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vetukalujir/u7ybjjZ/turoj.pdfIn PDF document text
    • http://sanalunuguto.22web.org/37928478065.pdfIn PDF document text
    • https://cdn.sqhk.co/zapiseniw/nialNze/blue_light_glasses_benefits_amazon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450419/normal_602d70493df25.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fonobufusig.rf.gd/diseases_caused_by_endospore_forming_bacteria.pdfIn PDF document text
    • http://tewidunutazi.rf.gd/ridumuware.pdfIn PDF document text
    • http://tujutur.rf.gd/fujixovozunoja.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_off0000dbef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEF 5764 bytes
SHA-256: f49721cc629713ef620cba01e0d64d8450ff9a191f1bcc67b08bda18d746854c
font_01_sfnt_off0000efa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA9 11280 bytes
SHA-256: 3711230e1d0c902ad9893c464498145fc788ecd49446d6844e87020718997984

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