Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d8d7e952b3a67e5…

MALICIOUS

PDF

74.2 KB Created: 2020-11-19 06:46:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4678293fb2c166b8cfeca21e7752efe9 SHA-1: ef973ab3558d165c35b86f61e120c6d33ec8aef9 SHA-256: 2d8d7e952b3a67e5bac56d857df109a73064da8bcf4063176c19c8a04bcc8198
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable domains and redirectors, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ggtraff.ru/123?utm_term=situs+poker+online+idn In PDF document text
    • https://luzatewuxajexi.weebly.com/uploads/1/3/4/2/134265782/c98145aa09ae47.pdfIn PDF document text
    • https://kidodekorabatet.weebly.com/uploads/1/3/4/3/134320193/4311180.pdfIn PDF document text
    • https://wamokanudetavud.weebly.com/uploads/1/3/4/5/134510572/dde14c.pdfIn PDF document text
    • https://limisakaxenit.weebly.com/uploads/1/3/4/3/134371081/mafijeninefera_libizalefaro_buwowokapipa_rewukiwam.pdfIn PDF document text
    • https://jawokipuroz.weebly.com/uploads/1/3/4/2/134265350/jitolexabi.pdfIn PDF document text
    • https://xiwesawubofu.weebly.com/uploads/1/3/4/2/134265581/4599835.pdfIn PDF document text
    • https://nesiritu.weebly.com/uploads/1/3/4/6/134612540/4196076.pdfIn PDF document text
    • https://rinumobepora.weebly.com/uploads/1/3/4/3/134377952/4089798.pdfIn PDF document text
    • https://fufijejelido.weebly.com/uploads/1/3/4/3/134351462/180657.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/150cb960-3e66-4702-995b-be9807f32141/nazi_zombie_army_pc_game_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7575db54-5f75-497b-a66f-222c47d327ec/93988870317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85b5dabf-1954-4941-a17d-5bc65d500ce9/depul.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/blister_forming_after_mosquito_bite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04c8f783-8d6d-4e34-8445-007b246628d0/70177463649.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/toliss_a319_livery.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA00 4792 bytes
SHA-256: ff271546b43486c909e48ba7c7a411e4b046a9b6fa16425d4f5eae0e8ee10f09
font_01_sfnt_off0000ea53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA53 10288 bytes
SHA-256: c041bc5dd8a307133df047c8c5bbc0237a452db943736e047762ed92f1a3ad28
font_02_sfnt_off00010d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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