Malicious PDF — malware analysis report

Static analysis result for SHA-256 930d94c2a54e744e…

MALICIOUS

PDF

57.6 KB Created: 2020-04-02 11:53:36 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0f32ef69ba35ae5d4ae8adfea913e3eb SHA-1: 19f5c66eb52b55eefb86981102c38cc41a9fa2e2 SHA-256: 930d94c2a54e744ef326a1a68718efe579145383104ce41f9553cf4229f11c9b
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links to external PDF files hosted on various domains. This behavior is indicative of a link farm or SEO spam campaign, designed to drive traffic to potentially malicious or low-quality content. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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 http://superioreslcourses.net/uploads/1/3/1/4/131437666/131437666.html#que+era+polis+en+la+antigua+grecia
    • http://frontline-fit.com/uploads/1/3/0/5/130540097/f3d283bb3ee.pdf
    • http://elizaibarrafans.com/uploads/1/3/0/4/130494289/kodipe.pdf
    • http://delightfuldesignshomedecor.com/uploads/1/3/0/5/130589064/zetabet_kinane.pdf
    • http://simply-ang.com/uploads/1/3/0/7/130775015/befulabirumusagidixi.pdf
    • http://tangledupinbluesclothing.com/uploads/1/3/0/7/130739371/6614260.pdf
    • http://rubykwon.com/uploads/1/3/0/8/130874162/gupobebo.pdf
    • http://intavasalon.com/uploads/1/3/0/4/130436307/rokapiwab.pdf
    • http://cheftaylorreilly.com/uploads/1/3/0/5/130590717/bb0c5c495cb2e28.pdf
    • http://mrshaines.com/uploads/1/3/0/7/130775971/gorivuvavalota.pdf
    • http://rehadfurniture.com/uploads/1/3/1/4/131453027/ede4c.pdf
    • http://caribfishandmore.com/uploads/1/3/0/7/130739163/2965f8975.pdf
    • http://bestlittlesouschef.com/uploads/1/3/0/4/130483409/ganoxinib_xazuxoku_tojapubux.pdf
    • http://sorrentinogroup.us/uploads/1/3/0/7/130776003/joler_tutidi_jopepefadiraf_lofuzodosogozok.pdf
    • http://clownthreat.com/uploads/1/3/0/4/130483265/kuxuwosenipudu.pdf
    • http://artceterahouston.com/uploads/1/3/0/2/130289569/jijupofo.pdf
    • http://endurance2000.org/uploads/1/3/0/8/130874635/c6580e.pdf
    • http://valhallaparacord.com/uploads/1/3/0/4/130436130/bomimu_xepekefibar_bijezamar.pdf
    • http://taraannejohnson.com/uploads/1/3/1/3/131380901/4469237.pdf
    • http://vipagenciadeoportunidades.com/uploads/1/3/0/6/130604949/ec4ca1.pdf
    • http://elpicositocatering.com/uploads/1/3/1/3/131379923/411232.pdf
    • http://stop-age-today.com/uploads/1/3/0/6/130621211/fa0ddfd.pdf
    • http://carpetcleanergrandrapids.com/uploads/1/3/0/7/130739937/dukekofasolip_nopazoxu_xefizex.pdf
    • http://americanclaimsagency.com/uploads/1/3/0/7/130775063/141561.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b651.bin
16397666deb6d67b7fb763f93be66a2bb8c66ab394f61cb197fbd1fc9706120a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB651 8940 bytes

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