Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cd395212f186317…

MALICIOUS

PDF

67.2 KB Created: 2020-12-19 17:40:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d3065a102a116159a04be376113b17e4 SHA-1: 26bd3dcb5f6850aba34b30354f3a6828945f21b5 SHA-256: 1cd395212f186317d6fd029a6720508e4ba05568c4d5e3ee7480464aee54200d
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/strik?utm_term=helen+woodward+animal+hospital PDF link annotation
    • https://ziliseze.weebly.com/uploads/1/3/4/8/134855349/e42af00.pdfIn PDF document text
    • https://jobalexaxikut.weebly.com/uploads/1/3/4/8/134892204/donivuvavoviser-sotovida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369141/normal_5f88ff3363154.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373779/normal_5f8fa53aa277e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369174/normal_5f88c2b6605e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383452/normal_5fd76ed0a623c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406514/normal_5f93f21b3cfd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370064/normal_5fa92b81822d6.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/juvosi/37897670755.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/48679245959.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/pathfinder_kensai_magus_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/hollywood_dubbed_movies_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/bihar_iti_admit_card_2019_download.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_off0000c9d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D4 5252 bytes
SHA-256: 09af3223e182f02558e49ae23f73cada0197a0c1393048772b923186944edee8
font_01_sfnt_off0000db93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB93 10656 bytes
SHA-256: 52dc139d8fe34adf71355ac1c37266cf35c7d245ababcfe458e7c027ea3d4765