Malicious PDF — malware analysis report

Static analysis result for SHA-256 0745f049e151ac7a…

MALICIOUS

PDF

74.0 KB Created: 2021-04-17 02:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7a661dff7f272e04754f399c3a73341 SHA-1: 697d567e4a330f05062a585ff0d91c21134a4e19 SHA-256: 0745f049e151ac7a4fbaa3950a88efd73dbb9b0e5c760c71e3a9640b3d066696
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution attempt. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a deliberate effort to direct users to potentially harmful sites.

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://jacksth.ru/strik?utm_term=lean+six+sigma+certification+online+university
    • http://doweryklkq.space/963714392fz4tw.pdf
    • https://posepopofag.weebly.com/uploads/1/3/4/6/134609660/dutipipubuve_bugerazelanuka.pdf
    • https://ranetaxute.weebly.com/uploads/1/3/4/8/134886021/9377878.pdf
    • https://vemubofopelo.weebly.com/uploads/1/3/0/7/130776521/07f50a62.pdf
    • http://jizerigozigalav.getenjoyment.net/gikenedo.pdf
    • https://fojanatixisi.weebly.com/uploads/1/3/4/2/134265346/kipadubesitu.pdf
    • http://jokojujut.medianewsonline.com/jimopakidevini.pdf
    • http://nogeturafo.sportsontheweb.net/74129346457.pdf
    • http://gavojutopubiri.getenjoyment.net/vigafowevuforutib.pdf
    • https://fibumexil.weebly.com/uploads/1/3/1/0/131070733/sefivof.pdf
    • https://cdn.sqhk.co/rivogigaweb/hD6Lzjj/jivixovi.pdf
    • https://cdn.sqhk.co/vavetiset/gdjdoU7/goblin_guide_mkm.pdf
    • http://boribonabone.mypressonline.com/rejuwuba.pdf
    • http://mebelrostov.ru/sedumafiwefezisozg25c1.pdf
    • http://mowukedova.mypressonline.com/similar_triangles_proofs_worksheet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wadoromutisagar.myartsonline.com/hopeless_colleen_hoover_full_book.pdf
    • http://zudupaxub.myartsonline.com/18111867184.pdf
    • http://redifigikutusoj.myartsonline.com/what_did_ahsoka_say_to_rey.pdf
    • http://xowobovu.myartsonline.com/does_short_term_medical_insurance_cover_pregnancy.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5dd.bin
b446dcd0a08fc05cc49b29d6f2d98103953327a3ad293c286432e16b4a19be90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DD 5372 bytes
font_01_sfnt_off0000f829.bin
d1088918ab7e01f910ea824a1a1ff12253c3c961f89fed2d3e9b0f80744552bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF829 10160 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.