Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec74b06190f27520…

MALICIOUS

PDF

47.8 KB Created: 2020-11-09 14:06:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: dc4308e05976478e897b6770507df585 SHA-1: 2e540bb98b8b5f00f4eb0ff9049ef9a7397e2758 SHA-256: ec74b06190f27520d4e2131152264cf92854f5d730094fdccb0f6b9de7c36926
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://traffking.ru/strik?keyword=honda+150cc+dirt+bike+for+sale In PDF document text
    • https://cdn-cms.f-static.net/uploads/4459631/normal_5fa4a1cc6c91e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371023/normal_5f9a91bd30440.pdfIn PDF document text
    • https://xurafexejigaf.weebly.com/uploads/1/3/4/5/134588012/zefebinofo-xowugufobosomik-zunulezig-rigawad.pdfIn PDF document text
    • https://fupuvoriru.weebly.com/uploads/1/3/4/4/134494751/fagokonira.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378855/normal_5f97169225e86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378834/normal_5f993cebaa9c9.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/tabobujimo/addition_and_subtraction_with_regrouping.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/acidosis_metabolica_en_neonatos.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/automotive_can_bus_training.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/45496162621.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/beteriganoliwakunod.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/18134953430.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/bofopabezibubuvanamirob.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/sigagexopasaxamofotager.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/gowofu.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/46337830333.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/koji_ice_cream_maker_manual.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_off00007c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C90 5500 bytes
SHA-256: 72ac47d53ac7238cd9c6e5f269b4b20069d71a7e982f033b02d09fb6d78ed959
font_01_sfnt_off00008f58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F58 10108 bytes
SHA-256: 6af49f46ac5e3a1828cf0d114b59bb91f583a7227fa8df66118546e5b123d29a

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