Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c75a5821cf4c0ec…

MALICIOUS

PDF

48.9 KB Created: 2020-03-07 21:44:46 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3981024d3d10a8c578164c00439bc5b0 SHA-1: 18b5718943c8540d22633d94c7aa7bbc72d635f5 SHA-256: 9c75a5821cf4c0ecf184303a7ddf0d11cb17169a954de17e707e617084538fcf
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to similarly structured URLs on different domains. The document body text, though partially corrupted, mentions 'Adobe premiere pro cc 2018 text tutorial', suggesting a lure to disguise the malicious intent. The heuristic 'PDF_SEO_LINK_FARM' strongly indicates this is a link farm designed to distribute malicious content or lead to phishing sites. No scripts were extracted, but the sheer volume of external links points to a distribution or redirection campaign.

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://4pxt5.bpmtc.com/uploads/1/3/0/4/130490115/130490115.html#adobe+premiere+pro+cc+2018+text+tutorial
    • http://supersonalized.com/uploads/1/3/0/8/130813314/43ce3.pdf
    • http://fearnlondon.co.uk/uploads/1/3/0/7/130775732/46fbf9b2062babe.pdf
    • http://veloswingfestival.com/uploads/1/3/0/4/130436482/0a3b078.pdf
    • http://unfinishedprayers.org/uploads/1/3/0/5/130588484/xamapunez-sivamikamudug-toritebetufamek-lalogaremew.pdf
    • http://www.wchahillclimb.com/uploads/1/3/0/7/130776821/027754bb0d.pdf
    • http://oxytocinenterprises.com/uploads/1/3/0/5/130590366/1338298.pdf
    • http://foothillsbiblefellowship.com/uploads/1/3/0/2/130289550/misejelok_gavar_militikof_nezitowuworise.pdf
    • http://www.dominicanbuttlift.com/uploads/1/3/0/7/130740130/f4beb4e.pdf
    • http://povertyacademy.com/uploads/1/3/0/8/130813764/e17e2.pdf
    • http://greenpointfederalinvestments.com/uploads/1/3/0/8/130813632/582211.pdf
    • http://blog.rosysboutique.com/uploads/1/3/0/7/130776602/xasezuvapejudi_ruzamizazusi.pdf
    • http://theobakerlaw.com/uploads/1/3/0/6/130621654/9728122.pdf
    • http://michelangelodiamondscollection.com/uploads/1/3/0/2/130272937/zovefepipifuwut_defotixij_xobup.pdf
    • http://kierragambrell.com/uploads/1/3/0/6/130622022/2399482.pdf
    • http://andaveycrea.com/uploads/1/3/0/7/130739210/3e76b38a19a2431.pdf
    • http://omegaunderconstruction.com/uploads/1/3/0/6/130604944/xebaxitavebi.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_off000098a1.bin
ef335ff7b386ccd9f06dda60be7099a0ac6b875bc28e1e6827e83ec63c4321bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x98A1 7520 bytes