Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe443932a85c913…

MALICIOUS

PDF

73.9 KB Created: 2021-01-21 03:59:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 187d817b6ac6cdc34caeeec437043a00 SHA-1: 8d330b2f17e26b8ddde73b8994a6f5158baafb86 SHA-256: abe443932a85c9130bb88d34c9ebc6f46926ca485e90ff33f57eda6896adba46
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The embedded URLs, such as 'https://traffmen.ru/123?utm_term=google+earth+flight+simulator+controls+macbook+pro', suggest a phishing or spam campaign aiming to redirect users to potentially harmful sites. The document body, though heavily obfuscated, contains metadata related to PDF creation and potentially search engine optimization terms, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/123?utm_term=google+earth+flight+simulator+controls+macbook+pro In PDF document text
    • https://cdn-cms.f-static.net/uploads/4492593/normal_5fbb156b15a40.pdfIn PDF document text
    • https://site-1168325.mozfiles.com/files/1168325/2020_nfl_football_predictions_week_1.pdfIn PDF document text
    • https://site-1178723.mozfiles.com/files/1178723/zapenireledavuvipeg.pdfIn PDF document text
    • https://site-1166082.mozfiles.com/files/1166082/bais_yaakov_cookbook.pdfIn PDF document text
    • https://dirotazu.weebly.com/uploads/1/3/1/0/131070105/4921062.pdfIn PDF document text
    • https://zokesafan.weebly.com/uploads/1/3/0/7/130775675/fazegim.pdfIn PDF document text
    • https://site-1084368.mozfiles.com/files/1084368/53808073928.pdfIn PDF document text
    • https://toroborelap.weebly.com/uploads/1/3/4/8/134867907/fifolewew.pdfIn PDF document text
    • https://volokosebu.weebly.com/uploads/1/3/4/8/134871595/jurika.pdfIn PDF document text
    • https://site-1168117.mozfiles.com/files/1168117/apache_php_mysql_server_android.pdfIn PDF document text
    • https://site-1174077.mozfiles.com/files/1174077/craftsman_tool_box_lock_diagram.pdfIn PDF document text
    • https://site-1185297.mozfiles.com/files/1185297/swamp_attack_2_hack.pdfIn PDF document text
    • https://site-1223236.mozfiles.com/files/1223236/danganronpa_3_character_guide.pdfIn PDF document text
    • https://site-1175555.mozfiles.com/files/1175555/zizimomujuvawip.pdfIn PDF document text
    • http://batezelokev.iblogger.org/vidmate_for_pc_32_bit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e27e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27E 5664 bytes
SHA-256: 4be2ace17337d610f8a2d6bcd7afd2934ea606577d881b7f337c42e263c8c093
font_01_sfnt_off0000f5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A0 10580 bytes
SHA-256: 88e16f9f3700ffe8a3481fd567db6086033fa595d74df61aac315acd3668219d

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