Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4e0c53ebc6a8d76…

MALICIOUS

PDF

44.0 KB Created: 2020-04-07 04:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2920c0d22390d5ac582755b192d235dc SHA-1: 30ad33f27436c6d458401b20e3f821303f54e613 SHA-256: d4e0c53ebc6a8d767525dcbaf12bd2482d4be17b16ecfcb48894c51423a65551
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier strongly indicates maliciousness. The document body, though partially corrupted, contains references to URLs, suggesting a lure or redirection mechanism. The primary attack pattern appears to be a link farm or SEO spam, potentially leading to further malicious content or phishing pages.

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://atelierjademyr.ca/uploads/1/3/0/7/130740251/130740251.html#gifs+animados+para+power+point+gracias
    • http://getshit420.com/uploads/1/3/0/7/130776607/nebotije.pdf
    • http://kshiv.org/uploads/1/3/1/4/131437012/libanawudasi.pdf
    • http://customerpro.net/uploads/1/3/0/4/130488626/pojudojoz.pdf
    • http://426ig.com/uploads/1/3/0/7/130740092/3148289.pdf
    • http://dn-city.de/uploads/1/3/0/2/130271245/xubapasave-keban.pdf
    • http://damonoscar.com/uploads/1/3/0/8/130814526/bepinuxixegorelovami.pdf
    • http://integritycostconsultants.com/uploads/1/3/0/6/130620302/xujok.pdf
    • http://tdmachinery.com/uploads/1/3/1/3/131379396/labobekik-fodezavo.pdf
    • http://borikendem.com/uploads/1/3/1/4/131408502/wapalefof_sigosuromubur.pdf
    • http://goldenimprints.com/uploads/1/3/0/7/130739090/5449695.pdf
    • http://transportationelevated.com/uploads/1/3/0/8/130874409/3ec3b8f71.pdf
    • http://thetablebroadstairs.com/uploads/1/3/0/2/130272330/xupiguki.pdf
    • http://siamobelli.com/uploads/1/3/0/9/130969508/taloxarijigis-tezofaropalux-zesilix.pdf
    • http://dearanimal.com/uploads/1/3/0/4/130483067/mufagojeg-muwidamages.pdf
    • http://ledrewcostello.com/uploads/1/3/0/8/130874076/a476a37437d.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_off00007ed0.bin
1ebe918ab4a01afc165fee7e6b46ad10ee2298460f234daf1de3b4264007129a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED0 10428 bytes

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