Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe9556a10ccee477…

MALICIOUS

PDF

78.4 KB Created: 2020-12-27 09:31:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5f8619e79043bb14750e28b9d2ef6cc6 SHA-1: bbd6d616754fc3bd09b020d2e05db46373333499 SHA-256: fe9556a10ccee47726478108ba922e46c82b2e6effd032988bf8e9cf56f23714
214 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating it is likely a phishing or redirection attempt. The embedded links, particularly the one to 'traffine.ru', are flagged as malicious redirectors, suggesting the document's primary purpose is to lead users to harmful websites. While no scripts were extracted, the PDF structure itself facilitates the malicious redirection.

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
  • 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=trombone+slide+positions+f+attachment In PDF document text
    • https://gapidekejoz.weebly.com/uploads/1/3/4/8/134876705/8060761.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/beluvarapo.pdfIn PDF document text
    • https://cdn.sqhk.co/dasupejej/tjeibeE/38998416580.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c4071c0-9cd8-49ee-b377-b906ae879a1d/82094982586.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/figo_guidelines_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c7f4ba5-b39e-4041-a7da-f419a6859707/52200978975.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/monupijujow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ecf1409-8a6c-4f11-9122-63a8f85354b8/nautilus_e614_elliptical_trainer_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/156fab06-4756-4962-a4cf-a41a54d83e4c/dil_bilgisi_km_sorular_ygs.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/bucket_list_marathi_movie_full_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be7a66f8-ba0f-4cdf-95ff-e4aed2532099/capitulo_9a-7_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/github_flavored_markdown_cheat_sheet.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_off0000deab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAB 5484 bytes
SHA-256: c536802f2e54be78e85062807f456aa32e85455d8130df54e8319d5f3053bfb2
font_01_sfnt_off0000f118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF118 11428 bytes
SHA-256: ffb7c6034b418ae91cc0102494a0c17e73d8f1c44faf547a9297b3921f87e675
font_02_sfnt_off00011715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11715 16120 bytes
SHA-256: 184efd0e138a9418359f6897f9ac56b5cd93cafbd57abf30711ac2aee7e18832

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