Malicious PDF — malware analysis report

Static analysis result for SHA-256 74c3a3db42fecd02…

MALICIOUS

PDF

42.2 KB Created: 2020-11-09 03:14:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 08be0cacadff2b8d2e597cb895f4007d SHA-1: 1651f1a4fa0cfc3a5218145fc00da6f77c4a2719 SHA-256: 74c3a3db42fecd02ee8ec75ebd0d3ea5781462bb15aa913fa769a486d64744df
134 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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?keyword=how+to+downgrade+minecraft+10 In PDF document text
    • https://rimowaxa.weebly.com/uploads/1/3/4/6/134610435/1310889ace25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387571/normal_5f98fb408d867.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403429/normal_5fa1c7fd0b134.pdfIn PDF document text
    • https://pasuliwipo.weebly.com/uploads/1/3/1/4/131452824/7696b1fa88.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/96b50da5375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368486/normal_5f893ad005597.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/wovexofek.pdfIn PDF document text
    • https://ropupapufodugut.weebly.com/uploads/1/3/4/6/134650221/kigovowo_jimulokoxo_votebanuv_buwog.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://s3.amazonaws.com/jebokizez/asu_school_calendar_2019_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/suludedaregopinenixesed.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/bopovo.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/crash_bandicoot_3_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/kentucky_wesleyan_football_camp.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_off000058a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58A2 5168 bytes
SHA-256: 6e10fd7b736acca45610857c5092fc0e08b4b89bd6d5c745e6ac0d957be5e8bd
font_01_sfnt_off00006a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A27 10492 bytes
SHA-256: 8f4e968b52d07801bdc86caf6b74a5736980e0823ef0f1dbe53e8f776f134477
font_02_sfnt_off00008de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE7 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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