Malicious PDF — malware analysis report

Static analysis result for SHA-256 312cd94825cf1ab9…

MALICIOUS

PDF

71.3 KB Created: 2020-12-07 05:43:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 041afb49729c8dc15171cb890fcd6917 SHA-1: 97824edd66863fa43e1e04abe75bc3b2f67d0291 SHA-256: 312cd94825cf1ab9ae02b04052bd81faa776cb5f9a337b61811800582d075755
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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/strik?utm_term=mortal+kombat+snes+moves In PDF document text
    • https://latenenagizogip.weebly.com/uploads/1/3/2/6/132696064/8002127.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392873/normal_5fa8218a2116b.pdfIn PDF document text
    • https://kewikadovus.weebly.com/uploads/1/3/4/7/134746666/xijuxisusufoges_vuzabalinu_vedexevoruvuv.pdfIn PDF document text
    • https://vavezumejut.weebly.com/uploads/1/3/4/6/134655991/gefozos.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/bazarerin-surilugajexu-jusibut-jopaxig.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/4f92b6f8-69b8-4d94-8be5-64d0387a29f8/downward_rotation_of_scapular_force_couple.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e701bda9c57a97be38be/t/5fc168dd3c02f22b9d422b3c/1606510813891/facility_inspection_checklist_usda.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc383e42cf09257bd7c65aa/t/5fc8a257094cf7617dc573e2/1606984280023/zatowezagin.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d2deea4a794d56670281/t/5fcd82b16f0099009e7b6423/1607303858876/gold_rush_mines_in_australia.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc12a1c9698b02c7f224c6f/t/5fc736666beae4543161cffa/1606891120025/vidifonevapaba.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA05 5100 bytes
SHA-256: b4ad76cb74291243d33de894de0a8bae2e0bebc0d77e233b46a27ed235649389
font_01_sfnt_off0000eb58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB58 11008 bytes
SHA-256: 569f332014c82026d8b7c26e9f69ffbdd3c14cd034e56766f7f6afbd3e218b92

Open this report in the interactive analyzer, or submit your own file for analysis.