Malicious PDF — malware analysis report

Static analysis result for SHA-256 961621593008fe0d…

MALICIOUS

PDF

44.4 KB Created: 2020-11-08 20:59:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 26f1f4f2acb49fb71073d2994e5ac0a4 SHA-1: b17579aa94b79d6d4b024113d292fef1924016d0 SHA-256: 961621593008fe0d19075d78ff2dd3d3bda5a87ab01464738dc9a948764a18d5
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains references to game guides and the URL that triggered the malicious redirector. The presence of numerous links suggests an attempt to drive traffic to potentially malicious or ad-filled sites, characteristic of a link farm or phishing lure.

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://traffmen.ru/123?keyword=skyrim+mage+guide+legendary In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377408/normal_5f9b11d2a44b2.pdfIn PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/3604300.pdfIn PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/kimudapatexul-tatonutawafu-fizagovido-sobedo.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/petikamov/desoligaxiwevosakunedokuf.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/88848988523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/653215f2-b78e-44e7-989a-b3e03a993c32/me3_tuchanka_mission_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b37e9325-b961-4cd4-91f6-3b751faaf382/boom_beach_unlimited_diamonds_and_co.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/debitibumeladomitunog.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/pudefegazazusejaxelegexur.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/moser_funeral_home_fremont_nebr.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/wexevovifab.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/ripilubozerevex.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/google_cool_math_games_snake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df645771-eab6-4b0d-a93e-478962c5173a/zojirar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24ab4998-8e27-4c84-a041-b01b475121a9/88939125920.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/basketball_legends_6969_games.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_off00006df8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF8 5236 bytes
SHA-256: fff85a3cd371b6f79d4a9409742fa8c29d61bc1f927053f0885915e568d71bed
font_01_sfnt_off00007fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBB 10300 bytes
SHA-256: 79cfac573c69a0e9f00fa02b89854ab2d521809786388fe860e9edf80d3385e5

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