Malicious PDF — malware analysis report

Static analysis result for SHA-256 13fe0223b1e05bd1…

MALICIOUS

PDF

49.3 KB Created: 2020-11-05 00:36:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 86fb9d7a2cbb5c9e9b9b7817357d6099 SHA-1: 200633bfccea44c7388b6c5c2a16ba5dd23bd18d SHA-256: 13fe0223b1e05bd17ee86ce447b57a1fd939d09a1a6722dbebc61d6c98a5c76e
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded links that redirect to a malicious URL, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text related to a 'Generac 50 amp manual transfer switch' and the malicious URL, suggesting a phishing or scam attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://gettraff.ru/strik?keyword=generac+50+amp+manual+transfer+switch In PDF document text
    • https://cdn-cms.f-static.net/uploads/4427528/normal_5f9d241506ed9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374848/normal_5f8b552e62d47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393641/normal_5f98c14ef28ad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/74aa1875-cf0a-4d23-9206-e1980ac31afc/24166662831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d545bc76-46ad-47a0-a27d-9980741d64fe/the_breadwinner_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/64690160411.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd299566-3b70-4819-a665-157501704357/d_d_heroes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baa1f0ae-51e0-4f5b-b530-7f50bf092b12/gixepizatosajogodi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0506cf03-0383-40f7-b333-5d19292a0bae/rakem.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/20447299203.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea9e2ec9-01a8-4d0f-9d14-4ac28afd4c1e/youre_beautiful_lyrics_jeremy_riddle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2155d5d3-7250-4e87-a85c-9645250c23c0/45067110341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d9952ff-fff8-4cae-aca4-8873e5c9857e/81179506976.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14846293-7989-40f1-93d7-eb579603aac5/xalawowe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9A 5416 bytes
SHA-256: 22851d61ea2d1955d16e9286d0f7ab1c52592ac72c16f721541a20df1f07a1d8
font_01_sfnt_off00007cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF0 14672 bytes
SHA-256: 06c5dc51b2e7b9d35ce1b1b166245f318f40e1dbb75229e0a955341b2ade8b30
font_02_sfnt_off0000aa9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA9C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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