Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06e327f5163c502…

MALICIOUS

PDF

76.0 KB Created: 2021-03-09 16:45:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 21d8c541cca849b397fa8773873409ee SHA-1: f241e26bc78557233f62568060404110825fe5f5 SHA-256: d06e327f5163c502ca4e80e0953f9e242febb73e3490ea134ada3f882ac8da75
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it contains numerous links, with at least one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. The embedded links are likely intended to lead users to phishing or malware distribution sites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=bow+tie+pasta+taco+casserole In PDF document text
    • http://wiwuwanulujero.iblogger.org/16127410294.pdfIn PDF document text
    • https://cdn.sqhk.co/zirevazul/ajaTkjd/prank_call_fake_caller_id_free.pdfIn PDF document text
    • http://ximasoj.22web.org/26903957774.pdfIn PDF document text
    • http://jebebixazonutug.mypressonline.com/38314531645.pdfIn PDF document text
    • http://dosemamorozaj.22web.org/bahubali_2_songs_free_telugu.pdfIn PDF document text
    • https://cdn.sqhk.co/navuwamas/dMgf8ih/wrap_rope_around_paint_roller.pdfIn PDF document text
    • http://tatuxuvoziparu.mywebcommunity.org/graco_magnum_pro_x7_pump_repair_kit.pdfIn PDF document text
    • http://gufopitasuwo.22web.org/puvizox.pdfIn PDF document text
    • http://penageli.getenjoyment.net/74341013162.pdfIn PDF document text
    • http://retamos.mygamesonline.org/81433074411.pdfIn PDF document text
    • http://rapegutuxipik.22web.org/22624474093.pdfIn PDF document text
    • http://xanusojuruxu.sportsontheweb.net/99837656489.pdfIn PDF document text
    • http://xexajume.iblogger.org/neloxobu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mujigivufutufu.rf.gd/what_is_contour_interval_answers._com.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/self_dependent_synonyms_in_hindi.pdfIn PDF document text
    • http://juvegebufu.epizy.com/driver_brother_2701dw.pdfIn PDF document text
    • http://fabedidatifi.onlinewebshop.net/bazupo.pdfIn PDF document text
    • http://rubujizuz.epizy.com/how_to_grow_taller_after_puberty.pdfIn PDF document text
    • http://nuzavaxevarap.epizy.com/38981577263.pdfIn PDF document text
    • http://zujejuxuj.rf.gd/xejufisenekizawetugu.pdfIn PDF document text
    • http://gevewodex.epizy.com/resure.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_off0000eba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA7 5068 bytes
SHA-256: bfdcab67e38b4b784b3e0e5baa2f3ef49195695d10df8d77f7f55acef2c361ed
font_01_sfnt_off0000fd06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD06 10984 bytes
SHA-256: 05ebf3021ba18dfc77e42ecbcfd530213b4c6407e1438bdfb2fa6c6d98d79b57

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