Malicious PDF — malware analysis report

Static analysis result for SHA-256 224fe9ebc6776e6d…

MALICIOUS

PDF

65.9 KB Created: 2020-11-24 16:26:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 59bc0edd2828a237e880c8361e93d191 SHA-1: de986d763d1ffeecab1b3dd27733340311c5c293 SHA-256: 224fe9ebc6776e6d13b03fee4a93d38dd4f9a9ab4c5f233da55657301afc9398
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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-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://trafficel.ru/123?utm_term=bissell+vacuum+filters PDF link annotation
    • https://zigeginuserepu.weebly.com/uploads/1/3/4/0/134041232/kopitamanig_sonotekevego_mifeserazota.pdfIn PDF document text
    • https://sutogibigasoju.weebly.com/uploads/1/3/1/0/131070189/9081351.pdfIn PDF document text
    • https://giwakatunu.weebly.com/uploads/1/3/1/4/131437107/sibapuzujideja.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/fddb5.pdfIn PDF document text
    • https://mafewesoxadix.weebly.com/uploads/1/3/4/6/134697647/sapaxavafobobitika.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/bezegoluzose/fruits_and_vegetables_english_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/whatsapp_beta_version_2._18._333.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/capital_humano_libro.pdfIn PDF document text
    • https://s3.amazonaws.com/temuxow/nox_app_player_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/249e9cb8-e5b5-49b4-9594-134863467d6e/tiwawejakemafimekasaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/42732559336.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/64904493052.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e398e15-c647-4650-a9ea-984a45a9bbb5/26221428043.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/chitra_kannada_movie_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/metallica_blackened_guitar_tab.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_off0000c79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC79A 5136 bytes
SHA-256: e0620361e4511b5a774620d2b400c604e3b10c85cf4f6ed99dad717b244649f7
font_01_sfnt_off0000d905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD905 10076 bytes
SHA-256: aa73698c9883784a662be19296f995b97d3b61bf2df4eb1400b5810daad64d1e

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