Malicious PDF — malware analysis report

Static analysis result for SHA-256 4efe1658b0f738e6…

MALICIOUS

PDF

61.3 KB Created: 2020-12-11 08:57:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: b6553ed5253db70e0581bfbdae692209 SHA-1: f5664b2f3dd8caf756d46b9f48cf4160601d760e SHA-256: 4efe1658b0f738e6d1b4790840643e124002d31ddca22999911bc9a6f189512c
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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?utm_term=barbie+dreamhouse+game+apk In PDF document text
    • https://jipidonano.weebly.com/uploads/1/3/4/3/134340070/xukiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393632/normal_5f9266837794e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377642/normal_5fcc9332deb73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477173/normal_5fb5c317c0cae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384320/normal_5f900c9fc9472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412899/normal_5f99bdd2b15fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504568/normal_5faea4ee7491c.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/fuwawibu/takulusirebusonarejiliz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5923088c99b6d37c70c4d/t/5fcc75f1c836a917f9056bb5/1607235058719/kipetu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd040c8bc8713fe6fea0c2/1606222861184/mirekezotubabozupusunu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cd9260f2895dc1e75cb0/t/5fc15a38e18c5c478e2e8a5c/1606507068020/hot_shot_bed_bug.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/8540428474.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b027104edf1d77a1e675/t/5fca9a0aad674710e4d2d2c8/1607113227485/t_mobile_tuesday_popeyes_code_invalid.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0de27085bf90c0efce9ba/t/5fc9b20d8d0ac92c7be01d77/1607053840388/snowflake_company_stock_symbol.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc67358116eb00e3c721a77/t/5fc995a02f5dbb44b774b571/1607046560524/80500114927.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_off0000b3de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3DE 5596 bytes
SHA-256: 504946d8fbf5d8dec4dc238d8bd3c04732e6f6658817a89a88ef7637a838475c
font_01_sfnt_off0000c6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AF 9884 bytes
SHA-256: 418b67f1fd72035933d9902f037a53d968da2ad99bc5ebe41357ef061ca4435c

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