Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccdaf02c452b1980…

MALICIOUS

PDF

69.5 KB Created: 2021-03-01 03:04:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f0aec0ace8c6da196f61b32f48130182 SHA-1: 7ec6c0be2d53b2490c72d866464ec48080a55373 SHA-256: ccdaf02c452b198070b4ee6e4968ac7b1617935751020fd046db1aa620299785
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 pointing to disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to exploit users.

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 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://gimoguvi.ru/aws?utm_term=dunkin+donuts+medium+mint+hot+chocolate+calories PDF link annotation
    • https://nusoselif.weebly.com/uploads/1/3/4/4/134470887/gevumamokodov_gesiriwe_vejisubexisolon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450152/normal_5fe2a8f925688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368958/normal_602f2d77112ad.pdfIn PDF document text
    • http://kifenefazujiz.iblogger.org/98729939993.pdfIn PDF document text
    • https://cdn.sqhk.co/nosamese/OHnI3gj/la_novella_delle_papere_weschool.pdfIn PDF document text
    • https://vixikubinimagap.weebly.com/uploads/1/3/3/9/133997110/4243996.pdfIn PDF document text
    • https://wapexuji.weebly.com/uploads/1/3/5/3/135329723/5f8395e43c375b3.pdfIn PDF document text
    • https://cdn.sqhk.co/dofewijoras/ggkigSw/36248939928.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_601b46b625d21.pdfIn PDF document text
    • http://geponimodenebev.22web.org/22296409912.pdfIn PDF document text
    • http://sukujugonada.22web.org/kinokawejawolagome.pdfIn PDF document text
    • https://sirutobij.weebly.com/uploads/1/3/0/7/130776617/16f293a7966.pdfIn PDF document text
    • http://desekikimok.22web.org/weider_ultimate_body_works_bench_review.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/4077708.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/fajujiju/biblical_timeline_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/nufuxafufaguko.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/cloudy_with_achance_of_meatballs_cast_cop.pdfIn PDF document text
    • http://gofosuxubajo.epizy.com/tuxagamis.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFED 5240 bytes
SHA-256: 30ba9403e6cc671c269ac91af57c1fdb6030dc530db0ab72b54d5b67cf1043ab
font_01_sfnt_off0000e19d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19D 10804 bytes
SHA-256: fcbf5bcf414e095ad5d438e2b6e0247546bb1458fb0a9582a8150d6c15aa53f5

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