Malicious PDF — malware analysis report

Static analysis result for SHA-256 45b799bb0e6be696…

MALICIOUS

PDF

42.4 KB Created: 2020-03-29 10:00:20 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: f4f85e3245467d7f40222fe522d5e10b SHA-1: c211f45efad85975afc2b05adc9ca8583040f485 SHA-256: 45b799bb0e6be696ecc54d86894df658e1ba567b6b37331b8f9c1dc0ed8afe54
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains references to these links, suggesting a lure to external content. The primary attack pattern involves directing users to a network of potentially malicious websites hosted on domains like fifthel.com and melbournehotelplaceholder.devsite-1.com.

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://melbournehotelplaceholder.devsite-1.com/uploads/1/3/0/6/130620660/130620660.html#ejemplo+de+aliteraci%C3%B3n+en+un+poema PDF link annotation
    • http://fifthel.com/uploads/1/3/0/6/130639157/7f40209d581.pdfIn PDF document text
    • http://neighborhoodpsychindy.com/uploads/1/3/1/0/131070776/nekamowatisekomabez.pdfIn PDF document text
    • http://theawesomeguide.com/uploads/1/3/0/7/130740232/sapujan.pdfIn PDF document text
    • http://www.tfqstudio.com/uploads/1/3/0/7/130739971/224915.pdfIn PDF document text
    • http://cemsinternational.com/uploads/1/3/0/7/130740562/faboliwawejex_zawetidasejumas.pdfIn PDF document text
    • http://shelneygirlfriday.com/uploads/1/3/0/7/130739012/9f2767d8fd65a9a.pdfIn PDF document text
    • http://doorrushfour20.com/uploads/1/3/0/6/130605278/kuzipivobosajitoso.pdfIn PDF document text
    • http://mta-sts.fw1a.ingridliberte.com/uploads/1/3/0/6/130622022/52826.pdfIn PDF document text
    • http://cwb4nepal.com/uploads/1/3/0/7/130775629/wusazuran.pdfIn PDF document text
    • http://leannephilip.com/uploads/1/3/0/6/130605175/volarafepubodid.pdfIn PDF document text
    • http://www.samshineart.com/uploads/1/3/0/9/130969281/a6dba0e716dee.pdfIn PDF document text
    • http://greshamheadshots.com/uploads/1/3/0/3/130324152/aa634ebac673522.pdfIn PDF document text
    • http://yolodestinationparties.com/uploads/1/3/0/7/130740517/subidapasan.pdfIn PDF document text
    • http://boltonconsultinginc.com/uploads/1/3/0/2/130289502/palesov_powobadumuzoku_xaguxakak_lavitaru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC8 8884 bytes
SHA-256: f1368cb701112f32d2bbc30da966bb8e36d0cf9599e3cab37d9d8d7c1735d427
font_01_sfnt_off00009052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9052 2652 bytes
SHA-256: e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea

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