Malicious PDF — malware analysis report

Static analysis result for SHA-256 172d531bb6d95693…

MALICIOUS

PDF

88.5 KB Created: 2021-03-08 15:51:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 7a024fba142a65473d02daffab270755 SHA-1: 1215fc715cc6ecc518cb4d866d5d4215215d51fc SHA-256: 172d531bb6d9569367b3262fd8162c1cb8bf1a6873aa42ecbdc7757f359663f4
136 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-severity rule indicating an image lure linking to an SEO redirector for phishing. ClamAV also detected it as a phishing trojan. The embedded URL `https://vilenefex.ru/strik?utm_term=separation+process+principles+pdf` is a key indicator of the phishing lure, likely leading to a malicious download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/strik?utm_term=separation+process+principles+pdf PDF link annotation
    • https://cdn.sqhk.co/zebapomiz/ff0jige/71655488443.pdfIn PDF document text
    • https://zevijilutijeso.weebly.com/uploads/1/3/4/8/134850931/dovuvoxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459320/normal_603b9bd762429.pdfIn PDF document text
    • https://cdn.sqhk.co/nowagenika/cuggifO/monitoring_internet_connection_c.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/jboBOa9/piano_tiles_2_apk_2015.pdfIn PDF document text
    • https://cdn.sqhk.co/gitaligido/7jajeyz/16401020417.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420260/normal_602793b56c14b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420608/normal_6044d988e6578.pdfIn PDF document text
    • https://zujujoweb.weebly.com/uploads/1/3/5/2/135297083/6831165.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470391/normal_603e77997a529.pdfIn PDF document text
    • https://cdn.sqhk.co/waximanodif/mghovaR/mipadelulipowerabokize.pdfIn PDF document text
    • https://cdn.sqhk.co/wevafofed/byhg2aL/suwememabopekodawerez.pdfIn PDF document text
    • https://cdn.sqhk.co/xovinexesun/ihKjcgg/flight_tracker_jetblue_2227.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421201/normal_5ffa24ca8e4ef.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/42ebec9c-0470-4060-bb47-4bc0a71180a4/historia_de_una_escalera_analisis.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/abide_forms_of_verb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e97d77d6-7352-455e-b5e8-efb21d03b50f/lexuxawimepogeluvote.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/acc_aha_guidelines_aortic_stenosis.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/find_the_noun_in_a_sentence_worksheet.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94F 6416 bytes
SHA-256: 15f1f49b80f446e7933a40d6c5645ba9b1ad3ddb6c90b7ed74ec66770e7def8a
font_01_sfnt_off00010918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10918 5252 bytes
SHA-256: 3b1195ce324c566db21430344fd4db470d52d5750bb40496ee7c315a4c61db84
font_02_sfnt_off00011b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B03 10328 bytes
SHA-256: b64248cf70e8e776bd1050157d8f5d8d2ed23d4106aace85c19370fec0737a13
font_03_sfnt_off00013e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E73 16220 bytes
SHA-256: 4183a9d693114bbb929954b7be5de3b8f137e75d3559f143ecad4ff21a743784