Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1d38bb360986bd…

MALICIOUS

PDF

35.5 KB Created: 2020-04-11 11:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cf574b108e5c84aed54a9e6386f7bfd1 SHA-1: 3967c111550a8dd01daca1b187433a03415532ae SHA-256: 0a1d38bb360986bd563cc5ccf3fe16c3a3ff1c3824c8c1a501ef08ba75364060
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm designed to redirect users to potentially malicious content or phishing sites. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://74-123-73-235.mgwnet.com/uploads/1/3/0/5/130588920/130588920.html#kontrol+sistemleri+pdf
    • http://honoredink.com/uploads/1/3/1/4/131438180/e80a726565b.pdf
    • http://fedupganderbusinessactiongroup.ca/uploads/1/3/0/2/130274282/xipegakidadolelo.pdf
    • http://theitaliantaxi.net/uploads/1/3/0/2/130271083/7923671.pdf
    • http://visionaryconsultinginc.net/uploads/1/3/0/5/130589151/6892592.pdf
    • http://dmcrush.com/uploads/1/3/0/7/130776688/8035147.pdf
    • http://vsserviciosinteventos.com/uploads/1/3/0/5/130588378/derifezore.pdf
    • http://i-am-a-sex-addcit.com/uploads/1/3/0/2/130287871/1577319.pdf
    • http://voteforelon.com/uploads/1/3/0/5/130540040/dijadag_sowaduralo_xixelopak.pdf
    • http://tekliteinc.com/uploads/1/3/0/2/130289204/miguvovefaf.pdf
    • http://wobizsor22.com/uploads/1/3/1/3/131381519/2600952.pdf
    • http://bellarose.us/uploads/1/3/1/4/131437298/620909.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_off0000628b.bin
7fb22f7199e7d84d18f4152c1ab2c95699816bf2ea0d03e0de75b8fe2610e7e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x628B 8264 bytes

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