Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2354e3a56e49af4…

MALICIOUS

PDF

42.3 KB Created: 2020-03-23 15:06:03 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c20acc84fe7a9c132a4f05114c77141c SHA-1: 75dd4c709b2a99f1518999866edae538f633477c SHA-256: a2354e3a56e49af40e751809024366a0e186dabe5d4dfe64aa912564d42bac5f
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files on different domains. This pattern is indicative of a link farm or SEO spam campaign, designed to drive traffic to potentially malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body text is largely unreadable binary data, making it difficult to determine the exact nature of the linked content.

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://wilmingtonladiesteawalk.org/uploads/1/3/0/8/130873994/130873994.html#objetivos+generales+y+especificos+de+la+anorexia+y+bulimia
    • http://masventureholdingsllc.com/uploads/1/3/0/3/130313363/zigiselutu_fuperobisafi.pdf
    • http://guiadoiptu.com/uploads/1/3/0/5/130551491/gederuzisigis_jujidasi_fefimalapire_defafugifopo.pdf
    • http://www.lonesycamorefarm.com/uploads/1/3/0/2/130272638/mufufuvixetega.pdf
    • http://intertito.be/uploads/1/3/0/5/130589275/523793.pdf
    • http://melselvidge.com/uploads/1/3/0/5/130550817/8493e06.pdf
    • http://sostenibilidaddelmenor.com/uploads/1/3/0/4/130476505/zironobubarelidu.pdf
    • http://kinneylmft.com/uploads/1/3/0/4/130483213/5113561.pdf
    • http://alienfirsts.com/uploads/1/3/0/6/130621839/1df1509b12a.pdf
    • http://livingthebigpicture.com/uploads/1/3/0/8/130873759/pegivakod_wubibanex_fipekapoma.pdf
    • http://nexcend.com/uploads/1/3/0/6/130604904/nikasuruf-livapisefemedu-gorifidid-jubiwosizu.pdf
    • http://infinityapproach.com/uploads/1/3/0/8/130874232/ripuva.pdf
    • http://sam45.org/uploads/1/3/0/3/130313323/lasewepakadave_zelipep.pdf
    • http://pizzalivree.com/uploads/1/3/0/8/130873908/malizoza.pdf
    • http://www.1800laborers.com/uploads/1/3/0/5/130543264/jejopomuxagewiku.pdf
    • http://moversdaytonabeach.com/uploads/1/3/0/2/130292148/rularepamenisoniz.pdf
    • http://thecrafterden.com/uploads/1/3/0/7/130776262/lokenoji.pdf
    • http://trijedbuilders.com/uploads/1/3/0/9/130969308/8907a833e450.pdf
    • http://trashycomfort.com/uploads/1/3/0/7/130739476/regilidefomaw.pdf
    • http://www.daviessbaseball.com/uploads/1/3/0/3/130323174/c14ba79.pdf
    • http://www.dixievetclinic.com/uploads/1/3/0/6/130604476/c9839adc81f2.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_off00007c3b.bin
f4adb25bb9755ae9763b5af51efd58e41268279e291222f077a1eaddb21202cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C3B 8468 bytes

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