Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa27f62a9132bc77…

MALICIOUS

PDF

71.0 KB Created: 2021-02-13 14:44:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 57297fe9d0b74e809552fa2a7419a349 SHA-1: ae63969ae6b029493b03b4dc7d70cef36742c888 SHA-256: aa27f62a9132bc77009f7204380ab6d6b9bb2b5ed754306c4536877fbd24db35
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://bologen.ru/wix?keyword=manual+ti-86+espa%25C3%25B1ol PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459787/normal_5fd674f9e1a47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380694/normal_601dcdd2d5d6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496013/normal_5fcf2e0be08a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480414/normal_5fcf3a412273d.pdfIn PDF document text
    • https://dutumujupag.weebly.com/uploads/1/3/1/3/131383630/jurunoxajulomu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409000/normal_5fe30d70d91bd.pdfIn PDF document text
    • https://xinosete.weebly.com/uploads/1/3/0/9/130968926/ririmo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479210/normal_5fedd5dc3ca68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368979/normal_60177aa8a338f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391896/normal_5fe624b5e8a7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453730/normal_5fdb530468520.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471946/normal_6019b95a6e931.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421611/normal_5fdf0a5fab621.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369935/normal_6003501639771.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387819/normal_602176a48fb94.pdfIn PDF document text
    • https://juvezunadu.weebly.com/uploads/1/3/5/3/135306862/xowawixidarifusudale.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/dgcMH42/clash_of_the_titans_2010_cast_medusa.pdfIn PDF document text
    • https://viwifigejemi.weebly.com/uploads/1/3/0/8/130814408/6020177.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61F 5316 bytes
SHA-256: 71a59d007763440d98a9547f81992559b9e9920231cacd2e9a185faa3287fabc
font_01_sfnt_off0000e811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE811 10964 bytes
SHA-256: 4841808b5b7a0525658072ffccd02db2a747f6488a81fb4ea2c3b17e0087c336

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