Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd2b29d1144271b7…

MALICIOUS

PDF

77.1 KB Created: 2021-02-25 13:54:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b980938913df3023fbf0c7f5c90709c6 SHA-1: ce56861b881d186b577d93a2c3f02836ca02f941 SHA-256: dd2b29d1144271b7d2746c75991dd04379c87867c6fca9a797ef45c576171127
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though heavily obfuscated, contains a URL that appears to be a lure for users searching for specific movie information. The presence of numerous external URIs, many hosted on disposable domains, suggests a link farm designed to redirect users to malicious content, likely phishing or malware distribution.

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://seumenha.ru/123?utm_term=what+order+do+the+twilight+movies+go+in PDF link annotation
    • http://vitofemegawe.getenjoyment.net/jisukuxobewazavalovoju.pdfIn PDF document text
    • http://rilomenininun.getenjoyment.net/casio_5081_analog_time_set.pdfIn PDF document text
    • http://tevutubiwij.getenjoyment.net/68994621910.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/dufofu.pdfIn PDF document text
    • https://zuxadozi.weebly.com/uploads/1/3/4/6/134662888/vekuwavo.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/how_spell_slots_work_5e.pdfIn PDF document text
    • http://sojosabomoki.22web.org/frontier_phone_number_to_report_outage.pdfIn PDF document text
    • https://subisadorug.weebly.com/uploads/1/3/1/6/131637552/zutufukemax.pdfIn PDF document text
    • https://gojamomajaso.weebly.com/uploads/1/3/4/6/134616238/4f7e0799200680.pdfIn PDF document text
    • https://lefilima.weebly.com/uploads/1/3/0/7/130775934/towuzoradede.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/icom_ic_207h_programming_software.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://takefaluzimun.rf.gd/49556351143.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/12925552658.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/how_to_teach_basic_paragraph_writing_2nd_grade.pdfIn PDF document text
    • http://bozalusi.epizy.com/biluvimavigaxipusezad.pdfIn PDF document text
    • http://kifemulawej.epizy.com/38304247205.pdfIn PDF document text
    • http://kijenor.epizy.com/duplicate_aadhar_card_print.pdfIn PDF document text
    • http://kidojudal.epizy.com/bheja_fry_full_movie.pdfIn PDF document text
    • http://papipafikumi.epizy.com/chest_guidelines_superficial_thrombosis.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/doteloka.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_off0000f10c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10C 5404 bytes
SHA-256: 1a4005f9fbb27df26181361f7fa995288fd0b1cf082f7c0b430ad43e6c77c3f5
font_01_sfnt_off0001035d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035D 10312 bytes
SHA-256: 7e4841b5de17dae7b7b5e19455e4dcade77d384a6e8b0c9343058ef2dfbd3cd1

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