Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2b4b1b9b12549e8…

MALICIOUS

PDF

37.9 KB Created: 2020-03-21 17:46:29 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ddd179fd07e55b3f9c361d3ce1d2bf3d SHA-1: 4639f244ef4e809fcc8798f78822a6e84fb68c59 SHA-256: a2b4b1b9b12549e8147f858c8fde2d7af79e7d8264fe02012f79f1774de0a5a1
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 as a PDF link farm. The primary link points to a page discussing the spiritual significance of a number, likely a lure. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a distribution or SEO manipulation tactic. The ML classifier strongly supports the malicious verdict.

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://tenrepnavigator.com/uploads/1/3/0/4/130483573/130483573.html#spiritual+significance+of+number+609
    • http://damnidontknow.com/uploads/1/3/0/6/130620657/jiruzixufod-wagidusekixej-topasixilu-vixuzurix.pdf
    • http://www.astrowitchcraft.com/uploads/1/3/0/6/130620704/tojazasemusaweg.pdf
    • http://mta-sts.mecze-dvd.pl/uploads/1/3/0/2/130287281/8677356.pdf
    • http://narayanaresortandvillas.com/uploads/1/3/0/2/130271209/fudununinupevuguz.pdf
    • http://tenzamusic.com/uploads/1/3/1/0/131070377/5711690.pdf
    • http://www.walleyefallbrawl.net/uploads/1/3/0/2/130288378/tafuv-tevivi-fowelam.pdf
    • http://mail.blackhillspediatrics.com/uploads/1/3/0/5/130551720/kibokibulodo.pdf
    • http://keepitplushevents.com/uploads/1/3/0/6/130639412/supemeg_zoxivekitulul_vijuzula_bixuv.pdf
    • http://ayerpublicaccess.org/uploads/1/3/0/3/130313366/kajed-lovopupebexev.pdf
    • http://womynrising.com/uploads/1/3/0/7/130776279/voxuredetikoj.pdf
    • http://skylight24.com/uploads/1/3/0/7/130740547/6487337.pdf
    • http://eliotvogel.com/uploads/1/3/0/4/130476976/1619600.pdf
    • http://theencoreshoppe.com/uploads/1/3/0/6/130640066/17d58e6d.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_off00006c65.bin
03dcec945098ec7a55521806b6886a3fd364418a2fdf12a3366da2c249f66879		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C65 7736 bytes

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