Malicious PDF — malware analysis report

Static analysis result for SHA-256 f956a02282ac41a7…

MALICIOUS

PDF

71.7 KB Created: 2021-02-28 09:08:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 1ba276cbd40478035b962ff11fcb4bc3 SHA-1: 4ed495c5ecb890fd511704bd5a79972f7c586de2 SHA-256: f956a02282ac41a7e2ee87efece42bf2672a8769a77f2e41a312c74dd2043ee3
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/award?keyword=ccmsetup+failed+with+error+code+0x87d00454+log PDF link annotation
    • https://gufagopa.weebly.com/uploads/1/3/4/6/134660265/zalupukoxoda-rekifewepaw-kozovibeburuxu-wofuzosuveroviz.pdfIn PDF document text
    • https://fexasesari.weebly.com/uploads/1/3/1/0/131070539/d7a6a03602b92.pdfIn PDF document text
    • https://donefuvo.weebly.com/uploads/1/3/1/1/131164418/31f8a70d941363.pdfIn PDF document text
    • http://pmaider.com/bootstrap_4_responsive_registration_form_templatebjyao.pdfIn PDF document text
    • https://cdn.sqhk.co/kosojilufut/jfHjeji/sidagoluvaroziwavel.pdfIn PDF document text
    • https://cdn.sqhk.co/mepetiruzi/g4F1Sic/nededivirirukilawuzos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412895/normal_5fe1d83f75c4b.pdfIn PDF document text
    • https://cdn.sqhk.co/gejixoneku/vSTid5N/71551436638.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/fomaralunex/3349381378.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/the_hollywood_reporter_student_subscription.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/kopeveneke.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/owly_for_twitter_mod_apk.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_off0000d9c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C9 6260 bytes
SHA-256: 76a93870e89a92c1a273768b31b7c01b78a20d3465c673ce1a5d52513e173045
font_01_sfnt_off0000ef0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0D 10212 bytes
SHA-256: e0a71c317ef4e7341aa48975cae17736db5e5de0d35bbd5925ca7d211ce921da