Malicious PDF — malware analysis report

Static analysis result for SHA-256 558f0b53558ae98f…

MALICIOUS

PDF

44.5 KB Created: 2020-05-14 07:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fcbc5bf1649c3e1972b7116d349297b1 SHA-1: e5fdc66bd02aa90f9b6e90b1148460fb61a141c0 SHA-256: 558f0b53558ae98fccb42dfc96556df3356a92acafce698dd0b6e00a46367310
94 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The document body contains a mix of text and URLs, including the specific string 'Akhiyon se goli maare nagpuri video', which appears to be a lure. The primary attack pattern involves redirecting users to a vast number of external PDF files, likely for SEO spam or to host further malicious content.

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://dhruvautomations.com/uploads/1/3/0/6/130620691/130620691.html#akhiyon+se+goli+maare+nagpuri+video
    • http://lavecinadivina.com/uploads/1/3/0/8/130813732/giruvere-gadixiwojut.pdf
    • http://aerodronetechnologies.com/uploads/1/3/0/6/130640162/tadelefososefijiwibi.pdf
    • http://mbfashionfitness.com/uploads/1/3/0/2/130273743/b82ed148.pdf
    • http://spookybfilms.com/uploads/1/3/1/4/131453433/rikez-tunexiva.pdf
    • http://ndtscan.net/uploads/1/3/0/7/130739584/5997329.pdf
    • http://guila.paris/uploads/1/3/0/7/130775698/kavegagaf_jezugigonesix_lobitilo.pdf
    • http://sanderellas.ca/uploads/1/3/1/4/131437656/sikodeninugifadat.pdf
    • http://modvintiqueinteriors.com/uploads/1/3/0/7/130775712/birenopowubewos.pdf
    • http://kentmarketgarden.com/uploads/1/3/0/2/130289252/sawojinupo-botazavilar-visajo.pdf
    • http://hopestreetproject.net/uploads/1/3/0/4/130489342/5193339.pdf
    • http://getrighttech.net/uploads/1/3/0/2/130272500/9f916f.pdf
    • http://teamkelp.com/uploads/1/3/0/6/130604708/texuvesufavajeb.pdf
    • http://poorcollegekidlandscaping.com/uploads/1/3/0/4/130435826/suvevewiwalireke.pdf
    • http://goldenstatebankruptcy.com/uploads/1/3/0/5/130590059/87d15dea1ce7662.pdf
    • http://wingardservices.com/uploads/1/3/1/3/131398156/7d268ff41b0c2.pdf
    • http://qatrw.com/uploads/1/3/0/3/130379431/1735432.pdf
    • http://ranfordelectricalservices.com/uploads/1/3/0/3/130323675/9f6203b.pdf
    • http://originalkingofkings.com/uploads/1/3/0/5/130589401/99d2e3.pdf
    • http://hipnosremotional.com/uploads/1/3/1/6/131637052/loginupar.pdf
    • http://backyardgiantgames.com/uploads/1/3/0/5/130588145/7f6ab2992d369.pdf
    • http://etuicollection.com/uploads/1/3/0/2/130288549/sixarob.pdf
    • http://vifestival.com/uploads/1/3/0/3/130313436/setavurawu.pdf
    • http://tourdetats.com/uploads/1/3/0/8/130874496/nogoxuzo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bcb.bin
8aa66936c542cd24a32fd64dd1f9acbec0de8afc0e1b517f686b1db96d32d763		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCB 11444 bytes
font_01_sfnt_off00007ff2.bin
13c540cfff82c4dbf750c4d8c74e2b7b4ef1ed85145f82e59f5e6266b522e2c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF2 16096 bytes
font_02_sfnt_off000094f4.bin
a36be392f5a0aae405803b22ba5f08564c47a7042d4ec0338b0013676bbc9a7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94F4 4340 bytes

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