Malicious PDF — malware analysis report

Static analysis result for SHA-256 990d7e256d553f72…

MALICIOUS

PDF

62.1 KB Created: 2020-11-13 20:23:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 25e885205d86b85601fe98b7250b1442 SHA-1: e5d79188795e02fbcaa57849154b5ca56c6d7ada SHA-256: 990d7e256d553f721d6bcd18ecbcf8d1d64ccb1f15786c9e1157ca01b6036d04
214 Risk Score

Malware Insights

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

This PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The embedded URLs, such as 'https://ggtraff.ru/123?utm_term=aquabot+pool+cleaner+manual', are indicative of phishing or scam attempts. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit users through deceptive content, likely leading to further malware download or credential harvesting.

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://ggtraff.ru/123?utm_term=aquabot+pool+cleaner+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369920/normal_5f8826d6507d2.pdfIn PDF document text
    • https://rikurifijuse.weebly.com/uploads/1/3/4/6/134681474/jomukirenetalezatobi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5fa1ce5f293b7.pdfIn PDF document text
    • https://nunoperiv.weebly.com/uploads/1/3/1/8/131856708/dedofabe-katamudotus-tukorir.pdfIn PDF document text
    • https://saloramorolo.weebly.com/uploads/1/3/4/3/134307331/juralaxasoriga_zopaboku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366995/normal_5fa86c0feb552.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424997/normal_5fad8c88ad804.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/c1595b48-258d-4f19-9241-681c21ffb0e1/38877654020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7805e9f4-f2c9-4a64-8610-3696458bf67e/57465192402.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5f39c13-3cfb-4572-a6d1-382c7265a90e/10832242276.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_off0000b4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4F7 5156 bytes
SHA-256: afd2b9974d9ab4fe951d4dd3c0c763d966c18c5653129a49a8471daa8e9a957d
font_01_sfnt_off0000c672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC672 11200 bytes
SHA-256: b1fecab81af9751dd5f68b81caa2865e891d4bfffcea229bf3df6b7e862d6d80

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