Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dc62c50b6272452…

MALICIOUS

PDF

81.5 KB Created: 2020-12-30 00:46:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0c37e83e3f09ce037492c3d9252c9616 SHA-1: ed7889e2222e14e9f7eedac92113d7cf8a707c0a SHA-256: 2dc62c50b62724520c94143e080efeac83df1ac03695ad0440049a4f2efa9f4b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files hosted on various platforms, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate maliciousness. While no scripts were explicitly extracted, the presence of numerous external URIs and the PDF_SEO_LINK_FARM heuristic point towards an attempt to redirect users to malicious or deceptive content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/123?utm_term=algebra+2+6.5+dividing+polynomials+worksheet+answers PDF link annotation
    • https://weratirotiset.weebly.com/uploads/1/3/4/3/134322017/c1a05146d2.pdfIn PDF document text
    • https://vibitidit.weebly.com/uploads/1/3/4/7/134712982/c9e258.pdfIn PDF document text
    • https://vumuzuvi.weebly.com/uploads/1/3/4/5/134506571/2181e862d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383794/normal_5fa79fd19fcab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383565/normal_5faeef585d022.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/volisilitij_luperodebif_vaxulaxolirid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369915/normal_5f8cfd376f795.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/30733737539.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63a60e2e-aeea-4795-a1b6-fa371c1ab3de/82295973619.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31700a52-62fa-4e92-94f9-a01a63526f48/manufacturing_engineering_and_technology_6th_edition_solution_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c68829be-ccfe-4e7d-acdc-79ffd322879d/vakisogusota.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09fa45ba-8a07-4612-9f44-6365b5371b78/3290168231.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE859 6264 bytes
SHA-256: 645f003c7d77223c48100795ad3c6dd88883f16b3d2abfa377f33c5582404087
font_01_sfnt_off0000fd9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9C 10936 bytes
SHA-256: 5959281c66da55eac30ef2c447258a701cbfdd12e14e87e4b81308f97435e8b3
font_02_sfnt_off00012320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12320 16140 bytes
SHA-256: 159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61

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