Malicious PDF — malware analysis report

Static analysis result for SHA-256 304d5be862ccbeb3…

MALICIOUS

PDF

51.0 KB Created: 2020-03-11 12:56:17 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: dbda45607177b6e09061d59311f327dc SHA-1: 6404942880deebb51dc0b00faa803eb1778138dd SHA-256: 304d5be862ccbeb33da45f255c1492bde2b5671e0a42c3d5f6d56be6a33c8717
96 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious websites. The ML classifier strongly indicated maliciousness. The embedded links, such as http://host172.carmichaelnl.com/uploads/1/3/0/3/130313088/130313088.html#dnd+5e+arcane+trickster+build and http://coloradocriminallawattorneys.com/uploads/1/3/0/6/130605254/0d6326cc39.pdf, are likely part of a link farm designed to distribute malware or lead to phishing sites.

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://host172.carmichaelnl.com/uploads/1/3/0/3/130313088/130313088.html#dnd+5e+arcane+trickster+build
    • http://coloradocriminallawattorneys.com/uploads/1/3/0/6/130605254/0d6326cc39.pdf
    • http://milwaukeesfavoritedj.com/uploads/1/3/0/5/130540208/teziruzagelaz.pdf
    • http://myssample.com/uploads/1/3/0/6/130604658/gabiberazivade-lubupu.pdf
    • http://minimalistlifedesign.com/uploads/1/3/0/6/130603965/gotanuji_dukox_dumofe_papevavelenuk.pdf
    • http://wcgreen55.com/uploads/1/3/0/6/130639743/xixesidurirej.pdf
    • http://sunilpersad.com/uploads/1/3/0/6/130604332/wizajekabe.pdf
    • http://rightjoin.com/uploads/1/3/0/2/130270985/3641625.pdf
    • http://brittnimehlhoff.com/uploads/1/3/0/6/130621325/6308615.pdf
    • http://justbcosmetics.com/uploads/1/3/0/6/130605380/fivijidugaf_nojizo.pdf
    • http://edinburgh-weekends.com/uploads/1/3/0/7/130740623/a889934.pdf
    • http://fuzzymath.org/uploads/1/3/0/5/130542940/2125177.pdf
    • http://werkthatbooth.com/uploads/1/3/0/3/130379928/sowololuxo-wadelotisukozoz-nuguxekok-xoginumadapu.pdf
    • http://acceleratedhealthnutrition.com/uploads/1/3/0/4/130435927/nuronoxorakaxepofib.pdf
    • http://mail.runstrong-ie.com/uploads/1/3/0/6/130639283/1494449.pdf
    • http://iqaluitbeaches.ca/uploads/1/3/0/7/130776182/ruzafa.pdf
    • http://bobcatinfo.org/uploads/1/3/0/4/130488416/divixulufu_wonalelobevis_rorivok.pdf
    • http://summerpodcastinstitute.com/uploads/1/3/0/7/130776819/2a5801573eba.pdf
    • http://corrpass.com/uploads/1/3/0/4/130478106/2516095.pdf
    • http://www.areyoulivinginjoy.com/uploads/1/3/0/6/130640183/mumogilo-wijonusuzu.pdf
    • http://susiesharp.com/uploads/1/3/0/5/130589080/4bd2f011d92e8ea.pdf
    • http://www.generatepos.net/uploads/1/3/0/9/130969298/921942.pdf
    • http://handiletter.com/uploads/1/3/0/7/130776413/abeeee.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009323.bin
8eda99c942de1606a3d78a0a8da9fe37d64868e962b03c2e1fee7eb9fbf490cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9323 8260 bytes
font_01_sfnt_off0000b317.bin
c0970b560b0038febb76a2ac44c6bcb2ba1807f9a4625acbd97fbfb5fa83b98e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB317 2536 bytes

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