Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d2dbf1860a2fd2c…

MALICIOUS

PDF

72.5 KB Created: 2021-01-02 12:31:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b0b753e2dd89eb8a2f1eba244a1fd711 SHA-1: c32b36f20531673e94a540f4695b3b1d6d432a66 SHA-256: 5d2dbf1860a2fd2c8072adad37d127da41e9193aaed6477cbe4d590cb001f3dc
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to 'traffnew.ru', which is presented as a 'new hire requisition form template'. The PDF also exhibits characteristics of a link farm, with numerous external links, suggesting an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. No scripts were extracted, but the presence of external links and the overall heuristic firings strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffnew.ru/aws?utm_term=new+hire+requisition+form+template PDF link annotation
    • https://tokinuxo.weebly.com/uploads/1/3/4/8/134848772/00fc3cbe.pdfIn PDF document text
    • https://cdn.sqhk.co/vilomikov/Ojdiay6/30386268508.pdfIn PDF document text
    • https://cdn.sqhk.co/xoradofexul/gK8jjDp/teddi_mellencamp_husband_child.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f888a4125795.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/xonobijikivo/89174002703.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/alter_ego_pc_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/fewit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b2b7d24-53bc-427b-b4a8-32f3070337af/audi_a4_b6_1.9_tdi_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/39734007565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24ec398a-4822-4a20-aea2-730e55f8aaf8/hayward_arts_council.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/54133345789.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5953555c-a2bb-4123-9d16-beb01cd16b9e/xukexukesudeviluzatop.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/projector_acer_x1123h.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAE 5328 bytes
SHA-256: 8061d24b36d12616606c12540819352e3f49f3bc5d16def1311397110fc745ae
font_01_sfnt_off0000f1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BD 10472 bytes
SHA-256: 9bb4ff6e75d0e0155b969d2aa8b97751bacd3278f250db4ee2e2747cfdd58847

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