Malicious PDF — malware analysis report

Static analysis result for SHA-256 78379deba1763993…

MALICIOUS

PDF

62.2 KB Created: 2020-12-31 15:15:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5e4b969ef24379ff348f604e059ee8cd SHA-1: 0741ae6ec36897e05f49bb67f5c5db3ef2bb506e SHA-256: 78379deba1763993df0ee749f462b06f278ff7a1e5d4e4facd2c059764f298c8
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate a phishing or malicious content distribution attempt. While no scripts were explicitly extracted, the nature of the embedded links suggests an intent to redirect the user to a compromised or malicious site, likely for credential harvesting or further malware delivery.

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://traffmen.ru/wb?keyword=neighbors%202014%20streaming In PDF document text
    • https://feronodi.weebly.com/uploads/1/3/0/8/130813799/sozozo.pdfIn PDF document text
    • https://dajifavetesa.weebly.com/uploads/1/3/4/2/134234726/2582532.pdfIn PDF document text
    • https://suvewuvasalu.weebly.com/uploads/1/3/4/7/134762181/robilemoba.pdfIn PDF document text
    • https://rogumine.weebly.com/uploads/1/3/4/4/134448770/1b5cd.pdfIn PDF document text
    • https://vidojibirulon.weebly.com/uploads/1/3/1/0/131070792/geguwazufew-kolara-wopola.pdfIn PDF document text
    • https://dorulitonen.weebly.com/uploads/1/3/1/3/131380258/9476375.pdfIn PDF document text
    • https://xosovixa.weebly.com/uploads/1/3/4/3/134318585/jegiwusinu.pdfIn PDF document text
    • https://lijujizakivim.weebly.com/uploads/1/3/4/6/134634855/gevobekune.pdfIn PDF document text
    • https://cdn.sqhk.co/solumapidema/Phflc1m/light_up_beer_pong_table_spencers.pdfIn PDF document text
    • https://ginefudev.weebly.com/uploads/1/3/4/4/134454890/nokivojodogek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cfa6629-f5c1-4169-b780-f56c283ae7ed/hp_pavilion_zx5000_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65999bd6-d505-468d-840a-889380b8ff3a/munewemimominotifez.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_off0000b458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB458 5588 bytes
SHA-256: 99fbde66e8a151abb321e856fcd7a13663c1fdca454cd22e4159315a2a011709
font_01_sfnt_off0000c745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC745 10848 bytes
SHA-256: fc5382ff575977507a94bf996b2ac480d62823814deeee6e974d560786e6da42

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