Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d51f3ffd9815f94…

MALICIOUS

PDF

51.6 KB Created: 2020-03-29 10:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bfa7f0a85bad2135792b551c8ca5a232 SHA-1: 5f7a239d8cfaede00f22a7bc1b9944cb134994b2 SHA-256: 7d51f3ffd9815f94624a2d9b367f9c26ff2a130fdc4327381d2e8a952eff2127
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, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though partially corrupted, contains URLs that are part of this link farm. The primary attack pattern appears to be a link farm designed to manipulate search engine results or direct users to potentially malicious content hosted on numerous domains.

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://lists.accordionapocalypse.com/uploads/1/3/0/5/130550679/130550679.html#diagrama+de+fuerza+axial+en+barras
    • http://www.tattoosbyaross.org/uploads/1/3/0/4/130483817/paxapu_kifaxe_vitiminili.pdf
    • http://atwi80d.com/uploads/1/3/0/5/130541384/rotazosa-vokevumupi.pdf
    • http://tejontech.com/uploads/1/3/0/2/130287521/4194984.pdf
    • http://n2itinteractive.com/uploads/1/3/0/6/130605406/7338886.pdf
    • http://www.bluepalmdiscounts.com/uploads/1/3/0/6/130639024/89e7f7197b.pdf
    • http://webdisk.startatravelbusiness.com/uploads/1/3/0/6/130639404/napew.pdf
    • http://mta-sts.mail.kenyeung.org/uploads/1/3/0/6/130639607/ec8dceb17ad3b.pdf
    • http://nutrimoda.com/uploads/1/3/0/5/130590361/nawebemop_zijulimunibisud.pdf
    • http://www.blackcardu.stefanaarnio.com/uploads/1/3/0/6/130604502/c59b00d3eb275e.pdf
    • http://docuprosynch.com/uploads/1/3/0/4/130489359/wufexuk.pdf
    • http://www.missouriphilharmonic.org/uploads/1/3/0/8/130814553/xatezidow.pdf
    • http://www.thechildrenscottagefortmill.com/uploads/1/3/0/5/130590169/zakojejas-jirubizufoz.pdf
    • http://thebreastfeedingdoula.com/uploads/1/3/0/4/130435532/37bb054103.pdf
    • http://adifferentbook.com/uploads/1/3/0/8/130874613/6121323d6.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_off00007b2f.bin
36d41d4eb3340aa42153b7a31f60ee1384895b6f06cfd7db7f5a0823864e87d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2F 9508 bytes
font_01_sfnt_off00009d66.bin
c3aedad773dac8a4db1bdc6a1b68aead5a6ecb4965e10d564dc282355e407b36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D66 3252 bytes
font_02_sfnt_off0000a8cf.bin
c1ab5f3f6c5e8549e8e6b279a4a221cb386785e0c276503ef1c4f156609eba46		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8CF 16520 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.