Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c1effe66563155e…

MALICIOUS

PDF

72.2 KB Created: 2021-02-02 20:32:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 549e42bba4b201498ab3d80643e37995 SHA-1: ed22ecaca1576e8e68bbcda25d326ba0fe06b2a1 SHA-256: 3c1effe66563155e68fa7ecfea8cdb1f54db70460273ba87aa7f3a26449222ff
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded URLs, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://druttle.ru/123?utm_term=scappoose+high+school+football PDF link annotation
    • http://kamini33.ru/pnb_rock_trapstar_turnt_popstar_downloadlgrm1.pdfIn PDF document text
    • https://zibekasosux.weebly.com/uploads/1/3/4/0/134040395/mevefuxenisujo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406455/normal_600c7c3b54bec.pdfIn PDF document text
    • http://goodik.fun/17389057743v5vjk.pdfIn PDF document text
    • http://vejenov.iblogger.org/guwulex.pdfIn PDF document text
    • http://butinejijobu.iblogger.org/wapuledagozafewemifikoj.pdfIn PDF document text
    • https://renudufodajofi.weebly.com/uploads/1/3/4/8/134884992/0fceffcd1d0d439.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416653/normal_5fca44e71f1e1.pdfIn PDF document text
    • https://lowunipuso.weebly.com/uploads/1/3/1/4/131453219/jezaxopupapexen-rorozexemilaw-nenefov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410462/normal_5fec9381f233d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_60111fd8ca982.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495685/normal_60102c0af074d.pdfIn PDF document text
    • https://lugilalosu.weebly.com/uploads/1/3/4/3/134314137/tefonatulasoref_piwidalejiwok_dopujozuk_zujarunebokokar.pdfIn PDF document text
    • http://afracheat1.xyz/tablas_de_verdad_ejercicios_resueltos69924.pdfIn PDF document text
    • https://wovugozota.weebly.com/uploads/1/3/2/6/132695813/a1e5f6379.pdfIn PDF document text
    • https://gidelusibi.weebly.com/uploads/1/3/4/0/134040719/bojuxinage.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://ferenekukosazu.epizy.com/tofadowawiwat.pdfIn PDF document text
    • http://zaxukesaludu.epizy.com/diy_hydrating_face_sheet_mask.pdfIn PDF document text
    • http://magivaxinel.rf.gd/pareto_fundraising_benchmark_report.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d16b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD16B 5108 bytes
SHA-256: adf8339c2cec95a426a919395cf2ca31bac96996a99f88197afe8b4179dd4732
font_01_sfnt_off0000e2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CA 10192 bytes
SHA-256: 68c524b4840d6633afb64773c7389b7304498056cfc67bc42a37c02fe4199844
font_02_sfnt_off000105ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AE 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.