Malicious PDF — malware analysis report

Static analysis result for SHA-256 630e7ce46e2a72ac…

MALICIOUS

PDF

44.6 KB Created: 2020-03-15 12:52:13 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 88a47d57543aa8bf32ba91e55a98de37 SHA-1: c0adb7a2b6dbb331ed4c283fca2e9ba96afb0717 SHA-256: 630e7ce46e2a72ac768312665efd033e1f30c168f9dc19aac75a99029b5e5976
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which are structured as a link farm. The primary URL, 'http://tdz539.bdgct.com/uploads/1/3/0/7/130775744/130775744.html#isc+class+11+biology+syllabus+pdf', suggests a lure related to educational content. The heuristic 'PDF_SEO_LINK_FARM' indicates a high volume of external links, a common tactic for distributing malware or conducting phishing. The ML classifier strongly flagged this PDF as malicious.

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://tdz539.bdgct.com/uploads/1/3/0/7/130775744/130775744.html#isc+class+11+biology+syllabus+pdf
    • http://wedding-hvar.com/uploads/1/3/0/7/130775222/bd98ed33584.pdf
    • http://choicecutengraving.com/uploads/1/3/0/4/130477890/tadaduzenosonufibaza.pdf
    • http://www.hoyfundraiser.org/uploads/1/3/0/8/130815303/917452.pdf
    • http://hattiestreasures.net/uploads/1/3/0/7/130739232/xafomajolex.pdf
    • http://numanagement.net/uploads/1/3/0/7/130740414/9902087.pdf
    • http://www.remnantsbarbersho.org/uploads/1/3/0/2/130272851/pepipazizibijugusa.pdf
    • http://omtoys.com/uploads/1/3/0/6/130603803/7242810.pdf
    • http://futbol-tips.com/uploads/1/3/0/7/130739101/dapisumuvi.pdf
    • http://www.remote.mackplumbing.com/uploads/1/3/0/3/130312998/jifegawonub.pdf
    • http://fastandshisha.com.au/uploads/1/3/0/6/130621757/3598480.pdf
    • http://grantspt.com/uploads/1/3/0/5/130546183/vexavevu_ratezinobizoput.pdf
    • http://ddsdelightsonline.com/uploads/1/3/0/7/130775784/1faf7.pdf
    • http://ps110q.org/uploads/1/3/0/6/130620622/gifijufora.pdf
    • http://www.sarahanneharris.com/uploads/1/3/0/2/130273884/jutovapupiboju.pdf
    • http://mail.richardgert.at/uploads/1/3/0/9/130969871/tamuduzijoved-najekepe.pdf
    • http://elementhomeaudio.com/uploads/1/3/0/2/130287971/nopusomobipagabevif.pdf
    • http://engenhoca.mobi/uploads/1/3/0/3/130379504/1678654.pdf
    • http://huntsville.pickupyourparty.com/uploads/1/3/0/4/130476047/e3f24.pdf
    • http://joannamenicucci.com/uploads/1/3/0/6/130604152/3034508.pdf
    • http://campaniellocrittercare.com/uploads/1/3/0/2/130291592/8524757.pdf
    • http://www.renewucounseling.com/uploads/1/3/0/3/130323148/9f520f6f.pdf
    • http://www.lh7legacyriders.org/uploads/1/3/0/7/130739150/b7574a083a9c26b.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_off0000849a.bin
72a588ac1f05bc5147e33b9da3b25239be3d5c8b56d4d7bf4435e8cd0181eeab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x849A 7912 bytes

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