Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c7d1b79ac246fc…

MALICIOUS

PDF

41.2 KB Created: 2020-11-04 15:55:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 46b3edf1f77801855dec3fdc36ecd53a SHA-1: 9da7f12ab7ba40fa9953ed62bd6a5ed3571048fa SHA-256: 65c7d1b79ac246fc597b3c4e6804912693aac1c85a9394abd3468d4dfca0720a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to known malicious redirector infrastructure or are part of a link farm designed to distribute malicious content. The document body, though heavily obfuscated, contains a URL that is also flagged as malicious. This suggests a phishing or redirection campaign aimed at users searching for specific game guides.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ttraff.cc/123?keyword=persona+3+chihiro+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380695/normal_5f927c37a6c3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380080/normal_5f8e29749490a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389085/normal_5f8d600c25b60.pdfIn PDF document text
    • https://gubetixe.weebly.com/uploads/1/3/4/3/134314982/wozuwepugose.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369519/normal_5f904bc410c91.pdfIn PDF document text
    • https://nadazilagola.weebly.com/uploads/1/3/4/3/134314388/pedojigikawama-vivure-segaromogezebe-wolekebupepep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386593/normal_5f9335699e2ba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pusori/the_manga_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3831/3128/files/enigmatica_2_light_server_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fdb989f-f359-4e09-9cb6-79dcbbf82b3b/pimokilemasavorowoguv.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/mibanifexuxeximewezaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1535/4543/files/69711431870.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/73747823470.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/wetuxumijapejameva.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_off00006375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6375 5336 bytes
SHA-256: 728293adfb51d814b2678e1c1ceec633c4194b54588e67c129c35b6351d9d1b8
font_01_sfnt_off00007591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7591 10128 bytes
SHA-256: 63b29491a460b46e73089ad6d95ae4511d47a991491c2b4dfe790a26fa9ad2c9

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