Malicious PDF — malware analysis report

Static analysis result for SHA-256 d322684650032ed2…

MALICIOUS

PDF

72.5 KB Created: 2020-03-25 13:17:44 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cc03e7db6e4b0bc66ac01dd55afe6f81 SHA-1: 74c1756029eddd2247254a9d75ddc0ea6ffc18d3 SHA-256: d322684650032ed283136ccf2850a2e013fbedc318ae65410fa77f146fd58eb3
94 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, pointing to various domains. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains a URL that is part of this link farm, suggesting a coordinated effort to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://hotzonefishingcharters.com/uploads/1/3/0/9/130968981/130968981.html#procedimientos+basicos+del+modelo+de+enfermeria+pediatrica
    • http://qes-id.com/uploads/1/3/0/4/130436095/93438b78.pdf
    • http://rodgersandcoonline.com/uploads/1/3/1/1/131163617/7547327.pdf
    • http://hp-imoney.com/uploads/1/3/0/2/130270895/3182176.pdf
    • http://kbfineart.com/uploads/1/3/0/4/130488412/1832566.pdf
    • http://stoutheart-focusedmind.com/uploads/1/3/0/4/130488092/wegovazetib-gefogep-rilavizof.pdf
    • http://www.cybercentreforeducation.com/uploads/1/3/0/5/130590261/778275.pdf
    • http://octobercrickets.net/uploads/1/3/0/6/130639559/vananebukorumavomemi.pdf
    • http://euro-trader.com/uploads/1/3/0/4/130489222/xurezemotimapibune.pdf
    • http://effizzycreations.com/uploads/1/3/0/6/130604667/jafex-dojix-masujitugijazu.pdf
    • http://sliceoffeist.com/uploads/1/3/0/8/130813332/522942.pdf
    • http://watchmepass.com/uploads/1/3/1/0/131071019/9569675.pdf
    • http://mdcoins.us/uploads/1/3/0/6/130640126/kibofovape.pdf
    • http://anarchistflags.com/uploads/1/3/0/6/130620669/55c969b45fdd69.pdf
    • http://220-server.earllproperties.com/uploads/1/3/0/6/130620230/1793d9ce34d0abc.pdf
    • http://livinghealthywithbecky.com/uploads/1/3/0/8/130874035/f9f34.pdf
    • http://netspeedsolutions.com/uploads/1/3/0/2/130287456/xatoxafomi_widemoremolojiw_faxij_sukawafonunum.pdf
    • http://www.shopblackharpoon.com/uploads/1/3/0/4/130488786/7554882.pdf
    • http://aoshri.org/uploads/1/3/0/2/130272421/masaro_molaleda_bolunoxatagozak.pdf
    • http://winkwhale.com/uploads/1/3/0/7/130775103/xosajota.pdf
    • http://neurology-u-tokyo.com/uploads/1/3/0/7/130739177/69652.pdf
    • http://journeytomichelin.com/uploads/1/3/1/1/131164318/nonajuwekejet.pdf
    • http://mail.alicesfineart.com/uploads/1/3/0/4/130477890/ridifanuwusas.pdf
    • http://ashish-jain.me/uploads/1/3/0/3/130313356/9166481.pdf
    • http://reliabledemandgen.com/uploads/1/3/0/6/130639251/93ff27a1f8d20.pdf
    • http://donsmarketemmett.com/uploads/1/3/0/6/130621464/duwul_wefokojexezaz_divawov.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d105.bin
c273497f675a71bf32eb81a4f6ef4d8bede1b5e9d1c2bdff589ea741db3237fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD105 1904 bytes
font_01_sfnt_off0000d99c.bin
3598717d2eb8dd5b92aaf36e702b6d6b66b71c69d94f211acd1ccb1a9b6db4c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD99C 9716 bytes
font_02_sfnt_off0000fbdc.bin
e1732afad814c741dd98b6db6bc7a41bee7146efcf81fc7fd6ccabd2c9be947e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDC 16036 bytes

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