Malicious PDF — malware analysis report

Static analysis result for SHA-256 8abdea66c903be4c…

MALICIOUS

PDF

37.2 KB Created: 2020-06-07 11:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24872879c884478b46787ca59bbf5536 SHA-1: 326408fe30808386773bf8ba3670837d68288f52 SHA-256: 8abdea66c903be4cf4fd1a707689944d35347157773a29297e6cc33e2c1aa93f
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting an attempt to manipulate search engine results or direct users to malicious content. The embedded URLs, such as http://74-123-73-136.mgwnet.com/uploads/1/3/0/3/130379482/130379482.html#los+funerales+de+la+mam%25C3%25A1+grande+para, are likely part of this scheme. The ML classifier also strongly indicated maliciousness.

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://74-123-73-136.mgwnet.com/uploads/1/3/0/3/130379482/130379482.html#los+funerales+de+la+mam%25C3%25A1+grande+para
    • http://chicagolandheadstones.com/uploads/1/3/1/3/131381422/1039634.pdf
    • http://healthsystemsoutfitter.com/uploads/1/3/0/5/130588700/nisinopaz_xonorinajuget_vupofasesuz_wovol.pdf
    • http://mail.wlanspots.de/uploads/1/3/1/4/131407965/vegusobowoguzesedasu.pdf
    • http://gillianreynolds.com/uploads/1/3/0/4/130489097/vunisivexi.pdf
    • http://ororossomonferrato.com/uploads/1/3/1/3/131381088/vaxobodufowuw.pdf
    • http://debradianne.com/uploads/1/3/1/1/131163834/dawobi-mavoz-gimapemuluvelem.pdf
    • http://davecovending.com/uploads/1/3/1/4/131452804/5980604.pdf
    • http://blissfulcatholic.com/uploads/1/3/0/5/130589337/bc0084.pdf
    • http://thesanctuaryofcapecod.com/uploads/1/3/1/8/131856376/cb19f.pdf
    • https://vikefejemor.files.wordpress.com/2020/06/nubitaxedafopewuda.pdf
    • https://rebadatewi.files.wordpress.com/2020/06/53754733829.pdf
    • https://nekalojowaj.files.wordpress.com/2020/06/nonake.pdf
    • https://sufajase.files.wordpress.com/2020/06/16307919004.pdf
    • https://didebonuruta.files.wordpress.com/2020/06/difufi.pdf
    • https://dazorabe.files.wordpress.com/2020/06/nibuwipopase.pdf
    • https://risuzonapi841266864.files.wordpress.com/2020/06/46942386706.pdf
    • https://dariwudali.files.wordpress.com/2020/06/19684655919.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_off0000623f.bin
89b4becf1f47c9845ef2b6031b780e7dd486b6de7024231d47b29563aec20339		 pdf-font-stream PDF embedded font (sfnt) at offset 0x623F 11312 bytes

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