Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae3d2edd2a85b9a4…

MALICIOUS

PDF

36.3 KB Created: 2020-06-04 14:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29c4a52958ecdbbf1ee95b184e7c48c5 SHA-1: f97bdc9a63c89e2723fa0ab6f2903f47257bb118 SHA-256: ae3d2edd2a85b9a4d04d19f218922b6fae575decca7c8b315a60770000328c0b
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO spam campaign. The ML classifier also flagged this PDF as malicious with high confidence. The document body contains a lure related to '21 day fix extreme video download' and includes multiple URLs pointing to PDF files hosted on various domains, indicating a potential distribution or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://blueshimmay.com/uploads/1/3/1/1/131164455/131164455.html#21+day+fix+extreme+video+download
    • http://lyricalarmy.com/uploads/1/3/1/3/131381450/a7c40916963c46.pdf
    • http://bwizebuildingservices.net/uploads/1/3/0/6/130639300/3039354.pdf
    • http://jessicajoy.com/uploads/1/3/0/7/130738511/larimavavon.pdf
    • http://jessiejewelryarts.com/uploads/1/3/0/5/130590243/59f48b91f9da.pdf
    • http://taylorstephentattoo.ink/uploads/1/3/0/7/130738786/kesenafemuwuzo.pdf
    • http://mailliesemp.com/uploads/1/3/0/4/130476242/jokulez.pdf
    • http://hostmaster.scautoservices.com/uploads/1/3/0/5/130589310/9730425.pdf
    • http://mannclass.com/uploads/1/3/0/8/130874278/bf0c69739.pdf
    • http://profitablepos.com/uploads/1/3/0/3/130313755/4036442.pdf
    • http://capitalmarketstech.com/uploads/1/3/0/6/130639824/4563269.pdf
    • http://blueshimmay.com/uploads/1/3/1/1/131164455/terms.html
    • http://blueshimmay.com/uploads/1/3/1/1/131164455/dmca.html
    • http://blueshimmay.com/uploads/1/3/1/1/131164455/policy.html
    • https://welenoxule717983587.files.wordpress.com/2020/06/nemujokijupamutigeduwo.pdf
    • https://rugubijewe.files.wordpress.com/2020/06/88832094288.pdf
    • https://bavewulowelo.files.wordpress.com/2020/06/57192310287.pdf
    • https://sufoxamij760944978.files.wordpress.com/2020/06/lagemarogo.pdf
    • https://zozumak.files.wordpress.com/2020/06/wisexogisupoxuloduxap.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_off00005f45.bin
b3b8954877ad05c73ba0908ed13ecdce51817eb939463518bf72d1fa0e99c911		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F45 11228 bytes

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