Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cb1d7718c6c188e…

MALICIOUS

PDF

29.5 KB Authoring application: PDFedit
MD5: d950af1c30d3155b58c776186cae0495 SHA-1: f6c04017cb74e40432a7de5b11f299167bb83f19 SHA-256: 4cb1d7718c6c188eef20cf4af870707465c2cf0c1927e8b9586aaf5b676e4d6e
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO poisoning attack. The ClamAV detection and ML classifier further support its malicious nature. The document body contains garbled text, indicating it is not intended for human consumption but rather to host these links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://smithandbeauty.com/uploads/1/3/0/8/130813883/kodus.pdf
    • http://tvtalkonradio.com/uploads/1/3/0/6/130621985/mazoru-jifilojaf-lizire.pdf
    • http://77dow1307.com/uploads/1/3/0/6/130604885/buxerevejusukufaded.pdf
    • http://hostmaster.thehousing.coop/uploads/1/3/0/7/130739240/liturimagiserid_kezekife.pdf
    • http://www.chicshak.co.uk/uploads/1/3/0/5/130588366/kowajovemiwi_pabilodud_gafiki_gogawixo.pdf
    • http://www.priscillanorwoodharris.com/uploads/1/3/0/7/130775651/9069ca2f747.pdf
    • http://budz.link/uploads/1/3/0/6/130621786/lutefubaziv.pdf
    • http://www.niagaracountycsd.net/uploads/1/3/0/5/130588724/junevo.pdf
    • http://learn-live-grow.barrettsblog.net/uploads/1/3/0/9/130969939/344fba3a6c1.pdf
    • http://pointsoffivetarot.com/uploads/1/3/0/7/130740374/mofozumuv.pdf
    • http://www.explorenj2019.org/uploads/1/3/0/5/130539913/kefurukazatefan.pdf
    • http://bestflooringco.com/uploads/1/3/0/5/130550732/xubamila.pdf
    • http://www.greateriscomingproductions.com/uploads/1/3/0/6/130639542/f8f848ddaff.pdf
    • http://www.letmebetheone.co.uk/uploads/1/3/0/6/130621243/pelifurugirawewoket.pdf
    • http://nathanael-cook.com/uploads/1/3/0/6/130620194/f8319dd3b0f37.pdf
    • http://techconnectwest.net/uploads/1/3/0/6/130604733/zudufitamovomizujam.pdf
    • http://91pond.com/uploads/1/3/0/7/130775171/govejerabozu-nemekuba-mibijise.pdf
    • http://nspfilms.com/uploads/1/3/0/7/130739368/5968012.pdf
    • http://ip-athletic.com/uploads/1/3/0/6/130620537/4085119.pdf
    • http://houstonsigndesign.com/uploads/1/3/0/5/130547078/130547078.html#ulnar+nerve+glides+youtube

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000017ee.bin
9dced6f8f2fb72d41de6321ad8218147f5fc020625e23334bc4d5d0ef809a5d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17EE 6428 bytes

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