Malicious PDF — malware analysis report

Static analysis result for SHA-256 d26556ad1a13f134…

MALICIOUS

PDF

117.6 KB Created: 2020-11-20 01:01:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8971020bb35ff3ff9202973fa1395860 SHA-1: 7ef9adfb321b6baa2078f95aca11210b7bae4588 SHA-256: d26556ad1a13f1349445f36af409fb84fed146b59a7c1bbbf62e98a47c1e6160
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'traffmen.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to other PDFs hosted on platforms like strikinglycdn.com and weebly.com. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffmen.ru/strik?utm_term=%25D9%2583%25D9%258A%25D9%2581%25D9%258A%25D8%25A9+%25D8%25AA%25D8%25AB%25D8%25A8%25D9%258A%25D8%25AA+motec In PDF document text
    • https://kukezedom.weebly.com/uploads/1/3/4/6/134629177/4094678.pdfIn PDF document text
    • https://wefejakero.weebly.com/uploads/1/3/0/8/130814310/sixenomowukonaj_labelo_tigigobuge.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/e9fbc6fa-d891-45bf-84cf-947cbdc836c8/dukan_diet_download_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c63c7c6-4737-4b78-a68a-556121d2b4e5/48402670984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5c7c7b5-4504-4cf8-9091-06c62a841004/xaretiludofilexuroziwiso.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/essential_oils_uses_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecf28415-1f81-4655-8ce8-406cb85ee09e/zorow.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/bufukekekebukujoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b863d00-cefb-499c-921b-3a682cb65a23/62818123728.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/lemadeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b566724-d7ad-4cbc-a4c4-9d16c5fe9158/66844138755.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/90652861702.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4888cb32-a8be-4b65-9c2d-eafccb8c0b22/boweniwifugosawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb740ff9-15dd-4b0a-83e1-9afc9a6ee278/selulanolaserudajulekepo.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00018dec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x18DEC 32936 bytes
SHA-256: 7bbea0e9fc8e875b3937cac83b271516f54ec6145cf1e45febd54a08e87b8131
font_00_sfnt_off0001452e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1452E 4332 bytes
SHA-256: 3b5cc1e4a0a1564803bfe0147d23d263a1f098454677538e4645accd8aedf8fa
font_01_sfnt_off000153d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153D7 9808 bytes
SHA-256: 863a0bef5c319a39b9ecc7c1e0c86b40357550058a9e1f66bed3871f999f59de
font_02_sfnt_off000175be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175BE 17048 bytes
SHA-256: 4f5badce31aeaccfe49fa485b39cb41e03772de871b6d272483c28cf00998882

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