Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c8e015cd942320d…

MALICIOUS

PDF

65.6 KB Created: 2020-12-09 17:55:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 925022381c3c6401c5eed144c23ba8c3 SHA-1: 638fbea1f5b61eb2df26a0eb639b6b75cf877b12 SHA-256: 7c8e015cd942320df12e753c09fe30b6282f63b942716d8087ddc053345afaec
214 Risk Score

Malware Insights

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

This PDF file contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged the document with high confidence. The presence of a link farm suggests an attempt to generate traffic or distribute further malicious content.

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://cctraff.ru/strik?utm_term=cute+asian+baby+girl+names In PDF document text
    • https://vefigemeg.weebly.com/uploads/1/3/4/3/134368147/9783551.pdfIn PDF document text
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/c9cea5883b06.pdfIn PDF document text
    • https://lapumutugafi.weebly.com/uploads/1/3/4/6/134601317/fuvilevara_papada_gesufame.pdfIn PDF document text
    • https://dixetomik.weebly.com/uploads/1/3/4/7/134775969/rovaruvu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5740f27a199023ad4140f/t/5fcd2f975177ea328ccc0ca4/1607282584291/mejamofuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bd735f9-ea6b-4552-a503-727fbeb774c2/wokoziwixepevisugigabew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/867ea4a4-7a2a-4238-b9eb-c811aaef71bf/nick_saban_contract_with_aflac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecf509c7-b3fd-4741-a485-c254dc8ca6b3/1205905926.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58510d49dd12447539740/t/5fcabd607426800f8bb974d3/1607122272578/empire_millennium_wars_gameplay.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe098d7acac6192a879efc/1606289805977/southern_auto_salvage_in_longview_texas.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57951239b0722915020fe/t/5fc8cde2bbb7f45a92933b72/1606995427053/koturiginolitilisovigu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe2f7791-c939-4d98-8059-6e0089a6556b/john_hardy_rose_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d941848-a005-4d3f-87f6-238e681c99df/download_from_nicovideo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc548af9955c744b5585162/t/5fc692f9cb3e0f57713647e9/1606849275311/60317672590.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_off0000c5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C1 5152 bytes
SHA-256: 96b5547e2e92a6568e317638bc09f2f2bb64a647fbe78e577ae9711749706419
font_01_sfnt_off0000d736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD736 10136 bytes
SHA-256: 9341e953e96f6e3a6e58a6884dec5da0b981aae75caf4df8eaa80a16e16a77f2

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