Malicious PDF — malware analysis report

Static analysis result for SHA-256 fccff0f82bf874ef…

MALICIOUS

PDF

77.4 KB Created: 2021-06-12 04:13:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 048fe1a0155e063bca44f3850fc7dfba SHA-1: 6894c512830e52488d8bc5856172e8f0585e4e5c SHA-256: fccff0f82bf874ef1e6d043962ca868144dcad2b020f098201ebfb5b67539cb9
136 Risk Score

Malware Insights

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

The PDF document contains a lure related to PDF compression, directing users to a URL that appears to be a phishing redirector. Heuristics indicate the presence of external URIs and an SEO redirector used for phishing, strongly suggesting a social engineering attack. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://medvor.ru/pbw?utm_term=compress+pdf+into+300kb PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484355/normal_60c3f48c9ea82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480402/normal_6035c423c2c0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422628/normal_6014cad377980.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485801/normal_60b836d4bee5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420432/normal_6044cdc3de6a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419818/normal_6013f62cbfea9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449397/normal_5fef5124c91c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425255/normal_5ffbb989b5745.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369653/normal_5fe92e940b511.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402244/normal_60170ff7ae933.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491687/normal_5fca2e142a34f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391013/normal_5feb0e4429213.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484818/normal_605bf4ae349f3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f9e938c-0ad2-4db0-9af2-bb5bfe59d606/namefusinunasogazova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a09a5003-75e1-45ce-ae03-ad47785a80ea/55032837089.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d826f60-715a-46d9-bb2f-a79c7cf5cf02/which_is_more_polar_ferrocene_acetylferrocene_or_diacetylferrocene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ecd4cf7-13ae-45a4-a639-7b25f73951ff/90802106209.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d389e531-69dc-4fe1-8fc3-e875f0d19b90/one_thing_remains_lyrics_and_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a4d791a-25e9-4b75-a6d1-a3d170cd6189/samsung_un55d6000_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f99ebee1-f971-4a00-9d79-5da381bef876/jopilixatamewufivexipu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0de2d80-341d-4f95-8b8a-6866dd2ab5f2/gramtica_inglesa_para_hispanohablantes_segunda_edicin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51ede344-552a-45b2-999b-b4cfd9b4630a/33704271962.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ab70c9b-464a-4ccb-9b6c-acda8a13687e/wahl_trimmer_blades_replacement.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_off0000ef34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF34 5360 bytes
SHA-256: ba2a105e8353bd996c070452fb01d912068ae1a98eb17bb2706575eeb9f98c04
font_01_sfnt_off00010156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10156 11048 bytes
SHA-256: b9408625182217a001434efa7da8686b2bbbd4e60988c325ed5bfb64cc93b9a6