Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc53620119ebc32a…

MALICIOUS

PDF

34.0 KB Created: 2020-06-05 20:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: ba967be58d808f603d61b1e029acdb89 SHA-1: 892cb22b896d0608a439a60881e6ce4084045c86 SHA-256: dc53620119ebc32a778a148a533861cf8fbd0b1153820163de44ddfb50012844
96 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The document body, though heavily obfuscated, contains text suggesting it is an 'instruction manual', which serves as a lure. The PDF_SEO_LINK_FARM heuristic firing indicates a large number of external links, many of which are likely part of a link farm designed to manipulate search engine results or distribute malware. The ML classifier also strongly flagged this PDF as malicious.

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://adventurefultravels.com/uploads/1/3/0/4/130435751/130435751.html#idog+instruction+manual PDF link annotation
    • http://blog.carolinafactoryoutlet.com/uploads/1/3/1/4/131454349/49c251150.pdfIn PDF document text
    • http://barbosaelitelifetravels.net/uploads/1/3/0/2/130287419/makad-xizupelus-povujiru.pdfIn PDF document text
    • http://thenestingspot.org/uploads/1/3/0/5/130551890/3558aa.pdfIn PDF document text
    • http://trustargo.org/uploads/1/3/0/8/130874307/6102595.pdfIn PDF document text
    • http://hostmaster.native-beef.co.uk/uploads/1/3/0/7/130776439/5765084.pdfIn PDF document text
    • http://probionsa.net/uploads/1/3/0/4/130435619/lomedo-kamopa-zepegurixikazi.pdfIn PDF document text
    • http://petesmith.nyc/uploads/1/3/0/7/130739389/5031991.pdfIn PDF document text
    • http://goatmansgathering.com/uploads/1/3/0/5/130588772/benezevegotuja_bozirefoxipidek_riwivegiv_wexovotiboruwu.pdfIn PDF document text
    • http://adventurefultravels.com/uploads/1/3/0/4/130435751/terms.htmlIn PDF document text
    • http://adventurefultravels.com/uploads/1/3/0/4/130435751/dmca.htmlIn PDF document text
    • http://adventurefultravels.com/uploads/1/3/0/4/130435751/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://wurufibugegu.files.wordpress.com/2020/06/bapurewilodukaxavat.pdfIn PDF document text
    • https://gusuwabawujo.files.wordpress.com/2020/06/55995400446.pdfIn PDF document text
    • https://zipovakolo364097725.files.wordpress.com/2020/06/dopanesi.pdfIn PDF document text
    • https://kufexetironi.files.wordpress.com/2020/06/zikeresenuzilidego.pdfIn PDF document text
    • https://budedugis.files.wordpress.com/2020/06/suvadutuxa.pdfIn 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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 1

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B41 9720 bytes
SHA-256: fcbb173e928f22a8e4ef65c27187674477b63cc26826a4311f05b27e9dbb49ec

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