Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d2dd99e598fce40…

MALICIOUS

PDF

74.7 KB Created: 2021-01-11 01:58:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 049d3f4a43656ad5d0c6de249e5e4708 SHA-1: 5cd5252442df9e7042c90c8f966c1c2b89cd1ed0 SHA-256: 5d2dd99e598fce40243ddab7480b99ec4f1609aea0bada88a674cb9f264d7034
184 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, and it contains numerous links to known malicious redirector infrastructure. The heuristic firings indicate that the PDF is a link farm hosted on disposable domains, designed to redirect users to malicious sites. The embedded URLs, such as 'https://traffking.ru/aws?utm_term=birthday+wishes+animated+images+free', are indicative of a phishing or malware distribution campaign.

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
  • 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://traffking.ru/aws?utm_term=birthday+wishes+animated+images+free In PDF document text
    • https://xutativapejan.weebly.com/uploads/1/3/4/5/134521393/fupuvepudilumape.pdfIn PDF document text
    • https://cdn.sqhk.co/lanabeja/aqhdvji/lazisan.pdfIn PDF document text
    • https://bepopasexib.weebly.com/uploads/1/3/4/3/134356469/tokomamejulotujal.pdfIn PDF document text
    • https://site-1181017.mozfiles.com/files/1181017/hispasat_sa_annual_report.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuvedije/jbyiegc/jiwidaj.pdfIn PDF document text
    • https://site-1168481.mozfiles.com/files/1168481/sl_theme_kde_oxygen.pdfIn PDF document text
    • https://viduxetejogat.weebly.com/uploads/1/3/4/6/134600114/kizan.pdfIn PDF document text
    • https://pebenari.weebly.com/uploads/1/3/4/5/134518206/52bb33b5.pdfIn PDF document text
    • https://site-1172046.mozfiles.com/files/1172046/tovoko.pdfIn PDF document text
    • https://site-1176216.mozfiles.com/files/1176216/duck_hunt_game_online_play.pdfIn PDF document text
    • https://site-1178035.mozfiles.com/files/1178035/wizurofujamasewizum.pdfIn PDF document text
    • https://site-1175227.mozfiles.com/files/1175227/minokeguximosoxizoribin.pdfIn PDF document text
    • https://site-1166608.mozfiles.com/files/1166608/italian_love_song_lyrics_in_english.pdfIn PDF document text
    • https://site-1171526.mozfiles.com/files/1171526/zombie_apocalypse_game_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/kajepo.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_off0000e748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE748 5532 bytes
SHA-256: 932abb5cdc536248c3364dfa95d1d94d5617236b7e5e7c16794396d13793c511
font_01_sfnt_off0000fa0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0E 10456 bytes
SHA-256: dd96ded23001602c832cacaa6383719599b0a7aeb0b5eee2649a56a18428489d

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