Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0a477120613575d…

MALICIOUS

PDF

52.0 KB Created: 2020-03-29 23:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d3b5b82847a00064e6cde80f00e7de27 SHA-1: e268a1e7c29a9cc0b5715e8254a8775aa46ee18b SHA-256: e0a477120613575dfe10f2000a6a82da84ed9a495bc0a7415c499a036ebd8830
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO scam. The document body itself contains a question about unit conversion, which is likely a lure to encourage users to click on the embedded links. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://host115.carmichaelnl.com/uploads/1/3/1/4/131454770/131454770.html#cuanto+es+3%2F4+pulgadas+en+centimetros
    • http://skycampgreenwich.org/uploads/1/3/0/7/130739347/922282.pdf
    • http://safelongbeach.com/uploads/1/3/0/7/130738666/fixatev.pdf
    • http://billbrice.info/uploads/1/3/0/3/130313064/2c9d5.pdf
    • http://growgreenpods.com/uploads/1/3/0/4/130488542/werugota_farafalo.pdf
    • http://brigidmarshall.com/uploads/1/3/0/7/130775016/715225.pdf
    • http://greenilk.com/uploads/1/3/0/4/130488141/tokediwofajonox.pdf
    • http://uite-laba16.com/uploads/1/3/0/7/130776143/negagivugozaz-xemekiwakavi.pdf
    • http://iqleadstyle.com/uploads/1/3/1/0/131070786/6655436.pdf
    • http://staszakphysicaltherapy.com/uploads/1/3/1/0/131070712/d1ac1e54507.pdf
    • http://davidsonsautosales.com/uploads/1/3/0/3/130313610/6007670.pdf
    • http://beautyforbrokebabes.com/uploads/1/3/0/4/130436078/bcf061e.pdf
    • http://gruporetolatino.com/uploads/1/3/0/2/130289694/ce6a9.pdf
    • http://joinhomesmartnow.com/uploads/1/3/0/8/130873992/rozivuxixasavopina.pdf
    • http://whitemagnoliacoordination.com/uploads/1/3/0/5/130590159/2434386.pdf
    • http://ninjahomeleads.com/uploads/1/3/0/6/130605118/4818078.pdf
    • http://socialenvironmentsenhancement.com/uploads/1/3/0/6/130639259/badudukeba_lawidibabofov_maxemo_gateruzuliba.pdf
    • http://hnbbestcare.net/uploads/1/3/0/5/130546040/limede_tomomawajasik_joxum_wotivud.pdf
    • http://healthbenefits.ca/uploads/1/3/0/5/130550744/fafoze-xujaf-xatigijumufa-zazadebizorumiw.pdf
    • http://210holyhiphoptexas.com/uploads/1/3/0/6/130604168/9492341.pdf
    • http://pawsibilities.org/uploads/1/3/0/7/130739404/gogurejowez.pdf
    • http://judyforarizona.com/uploads/1/3/0/7/130739004/kugixukopatoj-niwame.pdf
    • http://genesismedical.info/uploads/1/3/0/5/130588999/4b83653.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007561.bin
27c064391c4d62c9498bb2db75fc3bdaf2ab26c6421c4e662ece840156ac905a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7561 8340 bytes
font_01_sfnt_off00009430.bin
d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9430 2616 bytes
font_02_sfnt_off00009d3a.bin
885781ec91db75dc8c4a6a3d3dac0324bdfdb8f2239dab70466c62035ae072da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D3A 4144 bytes
font_03_sfnt_off0000aa30.bin
42fec308b7cab2f393414e9bdc1a6bd25b4aa0b9070acde390e3b63ffb91afd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA30 16100 bytes

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