Malicious PDF — malware analysis report

Static analysis result for SHA-256 3261a83f02b0b5f9…

MALICIOUS

PDF

72.2 KB Created: 2021-02-19 17:22:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9ca0f08b74d76a903effb166fac93be7 SHA-1: 5003328de42afe026ffe870b709eccc1d6b9cb80 SHA-256: 3261a83f02b0b5f91b7e6398c32049abc688ea103842591681d4b6e7d3b328f5
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://baarspo.ru/wix?keyword=byzantine+empire+study+guide+pdf PDF link annotation
    • https://xiwabuba.weebly.com/uploads/1/3/0/8/130813639/wivemevuwe-dutokoxebij-zixagitikez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482018/normal_60097b40e66a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454054/normal_5fec50f0d31f8.pdfIn PDF document text
    • https://mugokirupela.weebly.com/uploads/1/3/2/6/132681863/4c35d26bb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424040/normal_6017a9457cae2.pdfIn PDF document text
    • https://biparobotimipus.weebly.com/uploads/1/3/4/4/134498468/resadosufodefadozosu.pdfIn PDF document text
    • https://cdn.sqhk.co/sunidoxil/agW1gdj/jolulopatofejufizib.pdfIn PDF document text
    • http://francobusiness.com/how_to_use_the_snark_super_tight_tunerfzzjn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414867/normal_5ff68860a3761.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385636/normal_5ff654db3baac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495385/normal_600fa6ae76255.pdfIn PDF document text
    • https://takupomowemeb.weebly.com/uploads/1/3/5/3/135314116/2964867.pdfIn PDF document text
    • http://ch-data-2a8fv9s.pw/zabunukoso41r.pdfIn PDF document text
    • http://anarchymedya.com/what_security_job_pays_the_most2covd.pdfIn PDF document text
    • https://cdn.sqhk.co/toneribabut/aLVicji/548735250.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369150/normal_600a405c32de0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464530/normal_6006f20aa8add.pdfIn PDF document text
    • https://foxevavudutis.weebly.com/uploads/1/3/4/3/134380199/vutisijusuderibubipi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B4 5304 bytes
SHA-256: cc41d0386a494f13e701898d7164ebf91de5451970c57bf5b92c1b344062afa3
font_01_sfnt_off0000e3a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A5 9948 bytes
SHA-256: 47cf7a66d944789a4930cf08eabb48c6d1eb3debf7262bb38579a7951beff92e
font_02_sfnt_off00010575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10575 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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