Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc8dc28b2d0e629b…

MALICIOUS

PDF

61.5 KB Created: 2020-03-29 04:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d3128613f69a14f2fe8389fc22726493 SHA-1: 396acef3fdeb980e390c7ab936d0e0c9ce581ae3 SHA-256: cc8dc28b2d0e629bcd1b76fe9f038c118284de6e1946fb5a444d6339d1e690ce
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The embedded document body also contains URLs that are likely part of this link farm. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern appears to be a link farm designed to redirect users to potentially malicious content or for SEO manipulation.

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://74-123-76-74.mgwnet.com/uploads/1/3/0/4/130483679/130483679.html#2018+topps+heritage+minor+league
    • http://chickenmanofomaha.com/uploads/1/3/0/7/130740113/16994a89.pdf
    • http://shop.cykat.com.au/uploads/1/3/0/7/130775150/580394.pdf
    • http://ironthong.com/uploads/1/3/0/2/130289386/fimepefu.pdf
    • http://mastersuperiorpower.com/uploads/1/3/0/6/130639450/7294865.pdf
    • http://thomashartptnc.com/uploads/1/3/0/5/130589238/dapipezagobawud_budonuxoforor.pdf
    • http://technonarrative.com/uploads/1/3/0/8/130874397/vifuzowekibepajis.pdf
    • http://farmhousesectional.com/uploads/1/3/0/6/130605275/f0d24a89ca.pdf
    • http://mirikatzman.com/uploads/1/3/0/5/130588875/fudijererexuwa.pdf
    • http://benjaminsmithmusic.net/uploads/1/3/0/7/130739836/1256266.pdf
    • http://sportgirl.net/uploads/1/3/0/4/130483863/lotokuta-fuviguzawofe.pdf
    • http://www.portcityappliancerepair.com/uploads/1/3/0/6/130620880/04c532d14e7cec4.pdf
    • http://supplierflow.com/uploads/1/3/0/4/130483320/sefozaniweragoz.pdf
    • http://agorabarcelona.org/uploads/1/3/0/5/130538990/bexujirubinite_jozanojofogug.pdf
    • http://theyouthbox.com/uploads/1/3/0/2/130291785/rudadumojowenup-zemotesez-zexikemisobipu-talukilema.pdf
    • http://jlbloomslandscape.com/uploads/1/3/0/8/130874615/robovixew.pdf
    • http://tammyvreelandunseenbeauty.com/uploads/1/3/0/6/130604133/9551990.pdf
    • http://achievewellnesscenter.org/uploads/1/3/0/6/130639853/8055242.pdf
    • http://differentmixweddings.com/uploads/1/3/0/2/130272080/8a0cd72cf6cb0bb.pdf
    • http://emmachristopherlakesassociation.org/uploads/1/3/0/5/130551671/d283224.pdf
    • http://breakthroughprayer.org/uploads/1/3/0/7/130775339/nosuvuro-gamiwodanarak.pdf
    • http://hostmaster.hazlehurstcentre.org/uploads/1/3/0/5/130539325/tufogenuron.pdf
    • http://lauraslockett.com/uploads/1/3/1/1/131164448/7044727.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_off0000c86a.bin
e25763402dabb1d6afdd79a6e0f8759126d00c1352a24b0782bdaecc1a960683		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC86A 8248 bytes

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