Malicious PDF — malware analysis report

Static analysis result for SHA-256 be6679427a427528…

MALICIOUS

PDF

103.8 KB Created: 2021-01-12 16:00:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 46aa137aa7ad979e990341c2c394e3e6 SHA-1: 905a5a50ae9dfaa820322efc5e95830c05f8b066 SHA-256: be6679427a42752817951df90e07057f4a86c5ff7781290e83e7be5440e172b8
184 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://cctraff.ru/aws?utm_term=newsela+moana+quiz+answers In PDF document text
    • https://site-1176201.mozfiles.com/files/1176201/80s_retro_logo_maker_free.pdfIn PDF document text
    • https://site-1185570.mozfiles.com/files/1185570/2083857297.pdfIn PDF document text
    • https://site-1176294.mozfiles.com/files/1176294/kikkerland_design_rainbow_maker.pdfIn PDF document text
    • https://site-1177329.mozfiles.com/files/1177329/mots_scrabble_word_finder_francais.pdfIn PDF document text
    • https://cdn.sqhk.co/merodobiweve/gdTidjg/wild_wolf_chasing_animals_simulator_3d_apk.pdfIn PDF document text
    • https://site-1168274.mozfiles.com/files/1168274/90512995466.pdfIn PDF document text
    • https://site-1179246.mozfiles.com/files/1179246/road_trip_planner_western_canada.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/xedewofuretujo/5836088959.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/sodowirijofomaserekosowo.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A5 22120 bytes
SHA-256: 0caa350de5df712289a0dbc51c290de4cc160114d1fcc64959e19aab458425ba
font_01_sfnt_off00015976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15976 5068 bytes
SHA-256: 7439a71a52522d58ac9e47bdf74eb475d2ff7082c69a12b7624bad36ba515326
font_02_sfnt_off00016abb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16ABB 11900 bytes
SHA-256: 24f408ce6ee5691f39f6af9a539ae8d1cc0107a4377f40c320524aecf663b2a6

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