Malicious PDF — malware analysis report

Static analysis result for SHA-256 29aa95ae7c5259b6…

MALICIOUS

PDF

69.9 KB Created: 2021-02-19 22:11:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bb23b672c61a7aebff24b97c48c53e28 SHA-1: 83c9c9ea10b08b309e6ff3857e68441222a8d2b2 SHA-256: 29aa95ae7c5259b6c9bd45da11a1e4cd0c3ee4e0835c6e3664816024415e6cd2
196 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
  • 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://baarspo.ru/wix?keyword=ysp+2200+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446286/normal_5fe8a846ddd68.pdfIn PDF document text
    • https://cdn.sqhk.co/fapulatonupe/dyfjegj/doxifomunev.pdfIn PDF document text
    • http://moshon.space/parallel_space_lite_64_bit_support_keeps_stoppingetu3g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425913/normal_600e03c092419.pdfIn PDF document text
    • https://dilukali.weebly.com/uploads/1/3/4/5/134584555/9358025.pdfIn PDF document text
    • http://online-sistem.site/choreography_app_free3obd0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473632/normal_5fdcddfe31c4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413013/normal_600da2de3e021.pdfIn PDF document text
    • https://fegojobakib.weebly.com/uploads/1/3/1/1/131163858/0840fc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414486/normal_601f41115503e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463526/normal_5fffa4f318438.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_off0000d5ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AB 5104 bytes
SHA-256: caff6e77198b051d93565f226cea0b2201e094bdbb9e23e50641db8a117ac9e9
font_01_sfnt_off0000e6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FA 10748 bytes
SHA-256: b5728d45b0fbe8650fc294079944c4684eb4745433e5e2755e1d547bbce75d02