Malicious PDF — malware analysis report

Static analysis result for SHA-256 e89d040a20942001…

MALICIOUS

PDF

82.8 KB Created: 2020-12-28 10:25:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3187a191c66a43ceebab227578adf044 SHA-1: f74d76892e9be5621b3fae0a04d80eabd2d967c3 SHA-256: e89d040a20942001c922b09cb72b3bf83ab8da6d6ce9df8fc496e10d207b5855
244 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan. It contains a large number of embedded links, many pointing to disposable hosting services, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gettraff.ru/strik?utm_term=all+pokemon+that+evolve+with+dragon+scale In PDF document text
    • https://zokaduxenatased.weebly.com/uploads/1/3/1/6/131637020/19acc38.pdfIn PDF document text
    • https://direwuberegenis.weebly.com/uploads/1/3/4/3/134361890/189627.pdfIn PDF document text
    • https://nakalefa.weebly.com/uploads/1/3/4/5/134522788/gevovuzas-fefir-wirav-manoxixikej.pdfIn PDF document text
    • https://guvolobojifo.weebly.com/uploads/1/3/4/7/134733869/7c5c6c23504.pdfIn PDF document text
    • https://fomezesas.weebly.com/uploads/1/3/4/3/134343882/041b618bd2b.pdfIn PDF document text
    • https://xuwupeloz.weebly.com/uploads/1/3/4/7/134734270/8831887.pdfIn PDF document text
    • https://refamulu.weebly.com/uploads/1/3/4/8/134886446/gedofudaf.pdfIn PDF document text
    • https://wisadokuresagor.weebly.com/uploads/1/3/1/4/131436967/leresomawiferawulij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369173/normal_5fbf56fbc9fb0.pdfIn PDF document text
    • https://nimijakis.weebly.com/uploads/1/3/4/5/134577625/fa2e2a.pdfIn PDF document text
    • https://kuzosilu.weebly.com/uploads/1/3/2/8/132815793/21e5ab06.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/a5271907-85f5-4f65-a095-8ae7d7f1ed26/99312008647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2f1d784-3e47-4ce4-828f-0800da0e0d33/jasevaxotemezenuz.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/mexal.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/magimedufiz.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E0 3512 bytes
SHA-256: 52b83e4a14e2fa5c5ec37756139aa000da05042bdd3294f4f5087c3f43ba2d4e
font_01_sfnt_off0000e28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28C 5480 bytes
SHA-256: 296a9c679b39be8b22bedf27ea7febc94ec65557a08c617e13c8cb5bfa2d9a09
font_02_sfnt_off0000f50e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50E 10416 bytes
SHA-256: 7daa7a8fc81b222c992e77656e15d7022803ead61acb32f05e910e58038a79a2
font_03_sfnt_off0001189f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189F 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848
font_04_sfnt_off00012d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D67 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333