Malicious PDF — malware analysis report

Static analysis result for SHA-256 9599e75518cd44c5…

MALICIOUS

PDF

77.6 KB Created: 2020-11-24 02:10:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 003db0a7e9336868c434304cab044bf3 SHA-1: ba5dc54e86370156b95349cac655a2996e538f61 SHA-256: 9599e75518cd44c5331d78a972099d66c49f2983cfcef08c85a80e510d72a521
244 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are hosted on disposable domains and redirect to malicious infrastructure. The heuristic firings indicate it is a link farm designed to direct users to potentially harmful content. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://traffking.ru/strik?utm_term=face+%25C3%25A7alma+program%25C4%25B1+indir In PDF document text
    • https://numiduramar.weebly.com/uploads/1/3/4/5/134595515/7166328.pdfIn PDF document text
    • https://purowuma.weebly.com/uploads/1/3/4/4/134472698/58dbe58e18555.pdfIn PDF document text
    • https://tuwozuzoleza.weebly.com/uploads/1/3/4/5/134509843/xumurebewexogu_fepolovuket_dozepanemelepu.pdfIn PDF document text
    • https://nalatuzub.weebly.com/uploads/1/3/4/3/134324595/mokiwi-vozigug-simetexabodurij-riguvam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368951/normal_5f9a6e092105d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374537/normal_5f8ee1a100f40.pdfIn PDF document text
    • https://liziruji.weebly.com/uploads/1/3/4/3/134380663/lamaj.pdfIn PDF document text
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/9222548.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378605/normal_5f8b239b751f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421336/normal_5fa6d44680340.pdfIn PDF document text
    • https://zizuralozirufu.weebly.com/uploads/1/3/1/4/131483034/7885675.pdfIn PDF document text
    • https://bebamewikirebu.weebly.com/uploads/1/3/0/8/130874540/losig_mezifiji_wosuxexa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/87315210037.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/dokotaxenerawasawoputumu.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e07f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07F 5384 bytes
SHA-256: 705cf89b136db434a63c6114a15f1311c4a303a2892b7ba6cc5755c00b37fd30
font_01_sfnt_off0000f26c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26C 6068 bytes
SHA-256: cb159cc9d714520fdf604515834a8e5d6ccdf81551317d8133b939af7313f940
font_02_sfnt_off0001021c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021C 11996 bytes
SHA-256: e8a6afb1166a59012aba688fa55894b239b4343817cac0c64e9812ca4d4846b0

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