Malicious PDF — malware analysis report

Static analysis result for SHA-256 cddaae60c30b2ba4…

MALICIOUS

PDF

39.6 KB Created: 2020-03-09 12:42:29 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e3d46aa82eddafa5011b063b74a5016d SHA-1: face78f457e233aa8a7cb0bb3735dfb109b76cdf SHA-256: cddaae60c30b2ba4eee8cf7b1682be76ab069c41c48bd5d27a325bb6d0dc8e49
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains a large number of external links to other PDF files hosted on various domains. This suggests a link farm or a distribution mechanism for further malicious content. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a mass external link farm. No scripts were extracted from this sample.

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://9oeyv.slpny.com/uploads/1/3/0/8/130814931/130814931.html#how+do+you+determine+the+relative+abundance+of+an+isotope
    • http://jbarsandiego.com/uploads/1/3/0/7/130739332/bijazumexani.pdf
    • http://theupscale.store/uploads/1/3/0/6/130604493/7f8c8a5ee4.pdf
    • http://seantoshirohisaka.com/uploads/1/3/0/4/130483606/8014569.pdf
    • http://skemautic.com/uploads/1/3/0/6/130639197/634115b32f87.pdf
    • http://niumanatreecare.com/uploads/1/3/0/7/130775808/6401114.pdf
    • http://naturalperformancerehab.com/uploads/1/3/0/5/130551795/bejisalikadagi.pdf
    • http://relaxedskincarefacefullbodyservices.com/uploads/1/3/0/7/130775911/pavuzilulenake.pdf
    • http://www.peacockchildcare.com/uploads/1/3/0/7/130776003/c6d8d7c.pdf
    • http://monarchacquisition.com/uploads/1/3/0/6/130603749/6853855.pdf
    • http://bronxwentz.com/uploads/1/3/0/3/130313218/9425242.pdf
    • http://orionhat.com/uploads/1/3/0/7/130739852/zujifobaroxixoturute.pdf
    • http://deottoalberto.com/uploads/1/3/0/6/130621776/3259003.pdf
    • http://moonshot.games/uploads/1/3/0/5/130540453/14ffcf5a7f4.pdf
    • http://algonquinclub.com/uploads/1/3/0/4/130488500/f6473a81cc7.pdf
    • http://quickobservation.com/uploads/1/3/0/7/130776078/gewotaxogejokikup.pdf
    • http://new.iprwyoming.org/uploads/1/3/0/6/130639883/ebfe28af58de8.pdf
    • http://taylorcountydemocraticparty.com/uploads/1/3/0/7/130739119/1682684.pdf
    • http://futuresightbook.com/uploads/1/3/0/6/130621460/tuwobodapiwoji.pdf
    • http://top-stops.com/uploads/1/3/0/5/130588445/weziwubo-mipuzotesudid.pdf
    • http://www.whitetailstalkerarchery.com/uploads/1/3/0/7/130738562/bcb1ac1.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_off00007263.bin
c6e6733407ecdbbd57f2cfd7e1ad5e241d5d6ffb1f998d5b6323c29f9c765206		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7263 7724 bytes

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