Malicious PDF — malware analysis report

Static analysis result for SHA-256 d21cf3ae2377175e…

MALICIOUS

PDF

88.0 KB Created: 2021-01-04 00:15:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: cae654469c159525a8607549b581f840 SHA-1: d24dd74dea5a79a3aae93b327b35c8aa8ff16bf8 SHA-256: d21cf3ae2377175e2c0feee4bd721bccd39acf0fac70617a920377a06af06c0e
214 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, including a known malicious redirector. The heuristic firings indicate it is a malicious redirector and part of a link farm, suggesting its primary purpose is to direct users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to exploit users through redirection, likely for phishing or malware delivery.

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
  • 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/aws?utm_term=equity+livestock+lomira+market+report In PDF document text
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/tigosorivibisakoxu.pdfIn PDF document text
    • https://cdn.sqhk.co/semobisugigi/hAZBgdp/gifexejexasi.pdfIn PDF document text
    • https://gudosotavuna.weebly.com/uploads/1/3/4/7/134722070/30ad3f93c9ab.pdfIn PDF document text
    • https://cdn.sqhk.co/rajexizeba/MhdOM96/9409310225.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/111e7b5f-b2c6-431a-946e-103e283051d4/snake_mania_game_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41c82e07-b1ba-4052-bfd5-246f3ea65780/wetika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec597ca8-ab06-4ed0-95c1-50515bfe10c2/gareva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54290827-a943-4751-b8e8-e88dba402870/91418097832.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea135bb9-58c3-4d65-8673-7e67933f86cc/85255294517.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82e12f9d-8f69-4ca8-9878-2e46262c611d/tomuvigalatuzip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/594d8271-465b-4917-b9d7-a3d030712098/12500_tukwila_international_blvd_parking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f42fb48-4cae-4c66-bca7-aa4bb067d070/black_natural_short_haircuts_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/82828239827.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/54585906164.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_off000117ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117FF 5388 bytes
SHA-256: 1c08a3be156492c21b4dbd6c0d89695a315dc8d79a1c5a1955191ee9801a889c
font_01_sfnt_off00012a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A5B 12492 bytes
SHA-256: 29bf67103d7d4afa1ee677f94cf7cbd2b6ba2f898b994af30e3f376e21d766b7

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