Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbbc0890fe65175a…

MALICIOUS

PDF

69.6 KB Created: 2021-01-06 09:27:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 5e6be9fedda74110e0ff9a3dc2b77b4d SHA-1: c207a7da2a364ad948303bb404893f874a4c97a6 SHA-256: dbbc0890fe65175afc0ecc0f6570297dfeebda83640e9b51ea6dc8194fc46607
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF contains a large number of external links, many pointing to SEO redirectors, suggesting a phishing or link-farming scheme. The embedded URLs and the PDF's structure are consistent with attempts to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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://trafffi.ru/aws?utm_term=eeoc+reporting+2020 PDF link annotation
    • https://cdn.sqhk.co/zavufepugife/jsiihjJ/lidowegebeposufurugorin.pdfIn PDF document text
    • https://jesebumu.weebly.com/uploads/1/3/4/6/134617302/3156183.pdfIn PDF document text
    • https://libadelalisam.weebly.com/uploads/1/3/4/5/134579317/lolukepivab.pdfIn PDF document text
    • https://cdn.sqhk.co/makubeku/oggu1ja/62640088061.pdfIn PDF document text
    • https://fenatelelopowi.weebly.com/uploads/1/3/4/5/134510159/megitikipinunus.pdfIn PDF document text
    • https://cdn.sqhk.co/mewowoji/3Ujjgja/bike_stunt_games_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/jisujesox/gjggieW/wawuzafubivumaloteger.pdfIn PDF document text
    • https://cdn.sqhk.co/diratukuz/8ojhugh/gukevejidijesujukelinu.pdfIn PDF document text
    • https://cdn.sqhk.co/rifusofuwedi/hxgjOR8/70250909093.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
    • https://uploads.strikinglycdn.com/files/31776a72-70e4-46da-8e25-47f086206cec/the_lightning_thief_musical_bootleg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b3d28ff-b9c0-4450-8802-30bf1ee244f8/nesowidofunotepaneke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5879576d-6915-41ca-b977-f27b39a79e92/72893516259.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_off0000c82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC82F 4700 bytes
SHA-256: 60c42ed2bdac3419dae71cef4a9955d529eb564540b8ba1a80e82046016af61c
font_01_sfnt_off0000d839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD839 10484 bytes
SHA-256: 8b65ba5c00b4bfec769bba0215ce541f39c20197c5777a86f85fcbe17dc67434
font_02_sfnt_off0000fbd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD8 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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