Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a31142255312ed5…

MALICIOUS

PDF

69.9 KB Created: 2020-11-25 23:39:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7ee72220441b48e030dd0a74610ba153 SHA-1: 29413bbd3e0911c3d163eafa3e54bb113bb1f07e SHA-256: 0a31142255312ed5d45d244c7111a7b3714e1cebeaa32d1651737de667b9087b
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with critical heuristics identifying it as a malicious redirector and a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the document's structure and embedded URLs suggest it is designed to lead users to potentially harmful sites, possibly for phishing or distributing further malware.

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
  • 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://traffine.ru/123?utm_term=ib+recruitment+2017 In PDF document text
    • https://jazafojof.weebly.com/uploads/1/3/4/3/134310209/389302.pdfIn PDF document text
    • https://sibiwowimi.weebly.com/uploads/1/3/4/8/134868192/giguvem.pdfIn PDF document text
    • https://kelinabak.weebly.com/uploads/1/3/4/7/134728495/vapeme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410952/normal_5f990d4f512e1.pdfIn PDF document text
    • https://resowijex.weebly.com/uploads/1/3/4/6/134681832/1621315.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446642/normal_5fa2424577801.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://s3.amazonaws.com/fejatepudopito/amanda_knox_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc11661d-9d6b-4071-8b0b-499980ecf68d/xefemim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5c8369b-638c-42f8-bf22-95250332998f/28824348269.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92915dd6-82fa-42d8-b562-21b69b20e043/4389554447.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f6bfb1b-3f0d-4138-a3e4-b700f147f985/81382239257.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC873 4780 bytes
SHA-256: da58ddc5d7e518c323d12f0dd608a445d1d47cdb8a1fb694164641c6f7cd44ab
font_01_sfnt_off0000d8a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A6 10724 bytes
SHA-256: 72af728c1d90b314fff2792dc58be05441dce7a156a297239f57fa4ff4a8e5f6
font_02_sfnt_off0000fd38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD38 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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