Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff14783d10c58cbd…

MALICIOUS

PDF

78.5 KB Created: 2021-04-25 19:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0d1e8c883d3972fa4ac71523d1c24b0c SHA-1: 28643c22339237529eaa62401e22b4ca38361413 SHA-256: ff14783d10c58cbd1d3d0d3c56f91fed02dc258f174fcfecf1a122c953846bcf
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on disposable domains or cloud storage, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URI firings point towards techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://botokaw.ru/strik?utm_term=what+does+gdp+measure+and+why+is+it+important PDF link annotation
    • https://fopabitibomasad.weebly.com/uploads/1/3/1/8/131857723/698cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383572/normal_60309bbd0ad2f.pdfIn PDF document text
    • https://cdn.sqhk.co/burexewejam/eBoheQV/rujevezil.pdfIn PDF document text
    • https://korudodigujoko.weebly.com/uploads/1/3/0/7/130740169/6253521.pdfIn PDF document text
    • https://cdn.sqhk.co/pidikuso/ohdJhaP/vogavivebonuderefigowipu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427793/normal_5fd603099a483.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378827/normal_6001558acaa9b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414360/normal_600935a554321.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/anganwadi_2019_ke_form_kab_niklenge.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/41422771744.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/amnesia_anterograde_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/top_10_offline_android_games_open_world.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/89415030281.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/fishman_aura_16_review.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/genie_blue_max_3900.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/dell_2007fp_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/analog_film_seoul_free.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/lawinim.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/zowewelijel.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/74020986574.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_off0000f3d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D7 5548 bytes
SHA-256: 2a23b052a43734f0abdf0cea3d0be588ff3eeba4bf12265a783c9288910ed240
font_01_sfnt_off000106a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A7 11168 bytes
SHA-256: 2d8feb1522cfb748bfcd37b607645cc9b84c6c4a24b5bf0b106dafa54a0795e8

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