Malicious PDF — malware analysis report

Static analysis result for SHA-256 13a648ebb7d79b1a…

MALICIOUS

PDF

41.8 KB Created: 2020-03-29 07:13:26 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0adbab5f2f8669e9e0b1283cd6c9d34e SHA-1: 71ae380caa0547daa30b4fa58b3215c5d85b8325 SHA-256: 13a648ebb7d79b1ab52e708c1e70029f4fbace762e690e3e5e708e1efe9bf914
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting an attempt to manipulate search engine results or redirect users to potentially malicious content. The ML classifier also strongly flagged this PDF as malicious, indicating a high probability of harmful intent. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine a more specific attack pattern beyond link farming.

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://host.creativedatainc.com/uploads/1/3/0/5/130590689/130590689.html#wuthering+heights+heathcliff+revenge+quotes
    • http://hlibka.com/uploads/1/3/0/8/130874566/5cf41.pdf
    • http://wifebirthdaygiftideas.com/uploads/1/3/0/2/130271195/musadivoxijel.pdf
    • http://pequenascomunidades.org/uploads/1/3/0/4/130489926/lapifeletege.pdf
    • http://aromacaferestaurant.com/uploads/1/3/0/6/130605190/goximagorupel.pdf
    • http://www.kategrunow.com/uploads/1/3/0/4/130488331/e311c2696ff05.pdf
    • http://mttgames.com/uploads/1/3/0/6/130620565/dc1989f.pdf
    • http://barbrajayne.com/uploads/1/3/1/1/131164171/wofotusuter.pdf
    • http://oldtownpsychiatry.com/uploads/1/3/0/9/130969472/4370554.pdf
    • http://jfunkgeo.com/uploads/1/3/0/3/130323318/wuvabet_tivota_kesoledat.pdf
    • http://mkemotorsports.net/uploads/1/3/0/5/130551564/zitupajutojoga_mupumigofegin.pdf
    • http://www.tidbitsfrommom.com/uploads/1/3/0/8/130873735/firobujegewefe-bafisezalimare-ragaxisev.pdf
    • http://reichdozerservicellc.com/uploads/1/3/0/5/130539843/jefokodivuwiminapov.pdf
    • http://www.purchasetheroi.com/uploads/1/3/0/2/130289649/ziwivovid.pdf
    • http://authorrnewson.com/uploads/1/3/0/6/130639484/ee1929fc.pdf
    • http://dearmother.org/uploads/1/3/0/6/130604924/labufelutuniladuji.pdf
    • http://artworkbylindseydowning.com/uploads/1/3/0/7/130775685/3513682.pdf
    • http://onlinepokersite.org/uploads/1/3/0/7/130739664/ab738b3a99f5.pdf
    • http://www.baplamar.org/uploads/1/3/0/4/130476844/f047af5ee2fbb1a.pdf
    • http://www.investmentstrategiesforthelowwageearner.com/uploads/1/3/0/2/130272505/192673.pdf
    • http://bestondeck.com/uploads/1/3/0/5/130543684/rojex_zijudi_pabekilokojak_bexusu.pdf
    • http://colleeniesbeanies.com/uploads/1/3/0/8/130874586/dugezonut.pdf
    • http://augeascleaning.com/uploads/1/3/0/5/130539235/jafopena-dilemasegejut-pabud.pdf
    • http://oz-cubes.com.au/uploads/1/3/0/7/130740572/vexebasifesolo.pdf
    • http://paulmichaelcarr.com/uploads/1/3/0/7/130776725/vixomafuzeboju.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_off00007c3e.bin
e2dd5559fbd6fdadbeecd2053f74e81c784674b0adc709dad780de235d4114f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C3E 7384 bytes

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