Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b4a9d173998a016…

MALICIOUS

PDF

94.8 KB Created: 2021-04-06 14:18:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c9a72583909c0651c3fca1f91266492f SHA-1: 53055513b9af01084d09dd6aa3a537734714b25b SHA-256: 9b4a9d173998a0168a9ef87c55e8699ba78bb7cfffea99888e2f24730b93654c
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to a redirector URL, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and embedded links are characteristic of phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://xezojetit.ru/strik?utm_term=vitamix+a3500+review PDF link annotation
    • https://s3.amazonaws.com/gurupixabogivaz/library_planner_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/does_netflix_have_jack_reacher.pdfIn PDF document text
    • https://dupevolorimix.weebly.com/uploads/1/3/4/5/134588768/3d5424c.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/sivokevalajapoxalorowo.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/dizasizalopu.pdfIn PDF document text
    • http://vejaginupivedez.iblogger.org/3812560803.pdfIn PDF document text
    • https://kesizibewasi.weebly.com/uploads/1/3/0/8/130813921/saraxusetizo.pdfIn PDF document text
    • https://pixipemojawipe.weebly.com/uploads/1/3/4/4/134459682/rasileduliv-rarubirusuzup-sunulesejok.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/rosetta_stone_spanish_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/hays_australia_salary_guide_2019.pdfIn PDF document text
    • https://bopelesi.weebly.com/uploads/1/3/0/8/130874615/8745324.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/android_floating_action_button_position.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/chronology_of_king_davids_life.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/bifug.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/blues_march_benny_golson_sheet_music.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://667b589a-70dd-4c78-a03f-47f6e9f07b1f.filesusr.com/ugd/db80c5_d40918da74b74a5aa5d5f81169c2c6a3.pdf?index=trueIn PDF document text
    • https://feedbc21-cb93-402c-9ae2-3476589645d2.filesusr.com/ugd/f3ecbe_6e0c15b522414e4b8ff54fadbd50e93c.pdf?index=trueIn PDF document text
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_2b2af65a0d054dcb803754ebcfca9f0d.pdf?index=trueIn PDF document text
    • https://6a421494-2577-4416-904f-e17348f56b63.filesusr.com/ugd/85e76a_6e7bed551b4c470c88d03110774f2b03.pdf?index=trueIn PDF document text
    • https://e2a12503-e9f4-4898-9b1e-00959bf5a9c8.filesusr.com/ugd/1f0de7_6406cdfd115b4c3ea0b99026a964c665.pdf?index=trueIn PDF document text
    • http://ralenosozizog.epizy.com/lawunurikamunakobomidi.pdfIn PDF document text
    • http://fugovolit.rf.gd/bigusifebelaxejazas.pdfIn PDF document text
    • https://4f640d82-8365-4c22-93d6-dbd3427c3fb0.filesusr.com/ugd/55e8b7_8b5a6b1bf6b94e4d86327a780d2ad3ce.pdf?index=trueIn PDF document text
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_90001cac0b83493684b75d52ff2dbe4a.pdf?index=trueIn PDF document text
    • https://ff06b2c9-6223-4357-b4d5-1bf3807c749f.filesusr.com/ugd/717131_5c5205f34c244253a653aec9039d1af7.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D78 5236 bytes
SHA-256: 5283103f98137967c9003c52fe4069b3d2486c7a81841b5eaf2ee8383747e6e3
font_01_sfnt_off00012f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F4E 11636 bytes
SHA-256: f77c6f9d65bdf98ec92adb5bf45f665e4f874ecb69359f7dcfb48733147b527f
font_02_sfnt_off00015741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15741 16092 bytes
SHA-256: ee796b0d072c3da784915329e3d40b60a5f3ef2e5e1937d62fc4d7a384cee729