Malicious PDF — malware analysis report

Static analysis result for SHA-256 0077240dffa1d5fb…

MALICIOUS

PDF

111.0 KB Created: 2020-11-24 04:24:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 534fd5cb5a3a9fc8f321e8e7faf090f8 SHA-1: 7653c11d10cfb4f19e04fdf4960307fe62878beb SHA-256: 0077240dffa1d5fb5aa3f04ce440d7571c7b393cee537900cf276323c427d17e
244 Risk Score

Malware Insights

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

The PDF contains numerous embedded links to external PDF files, many hosted on disposable domains, indicating a link farm or redirection strategy. Heuristics confirm the presence of malicious redirector links and a link farm on disposable hosting. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification, suggesting the links may lead to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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=pokemon+reborn+development+blog In PDF document text
    • https://vumuzasal.weebly.com/uploads/1/3/4/5/134586685/6420797.pdfIn PDF document text
    • https://ronurakegilapoz.weebly.com/uploads/1/3/4/8/134852428/wuzasajifofod-wajoruvumeru-rimusov.pdfIn PDF document text
    • https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/ligifuvu.pdfIn PDF document text
    • https://welerenumabo.weebly.com/uploads/1/3/4/4/134467224/1b78506b3c99.pdfIn PDF document text
    • https://kipujoguburaza.weebly.com/uploads/1/3/4/3/134321983/9602213.pdfIn PDF document text
    • https://xavixikani.weebly.com/uploads/1/3/4/5/134502132/tafof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f87150552437.pdfIn PDF document text
    • https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/1166907.pdfIn PDF document text
    • https://birijoxumel.weebly.com/uploads/1/3/4/5/134587798/6953035.pdfIn PDF document text
    • https://newejata.weebly.com/uploads/1/3/3/9/133999860/367727.pdfIn PDF document text
    • https://sebanibukuj.weebly.com/uploads/1/3/4/3/134354661/4440713.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/de0b133d-a883-44a2-959f-90a06a077263/riworaz.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/guarantor_form_template_for_drivers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73e01746-ee99-4b0a-b00a-4f351111f29c/dozaxedomijimufezunaleso.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_off00014716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14716 4896 bytes
SHA-256: cda78fdac25b66bfd9a1fadebe9bf3961d342db91728708c42ffd72870be1c20
font_01_sfnt_off0001579e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1579E 2484 bytes
SHA-256: 71d489ca799b404f92f1f265c0ad790831edaee34d417a17e5a0bcd97902c65b
font_02_sfnt_off0001623d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1623D 11584 bytes
SHA-256: 97b8d5b89db1a47cfd16c70a852b27a3daa8d20512271d393346c43e80914eb1
font_03_sfnt_off000189fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189FD 16372 bytes
SHA-256: cd04c415aa34123e50c511ab00e178cfe1afd030f30f09c372900fe5b3c9fae5
font_04_sfnt_off00019fb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19FB8 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f