Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0993e6d2ea982f8…

MALICIOUS

PDF

36.9 KB Created: 2020-04-11 08:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c669a3a53506daf7df5391e5d52eeb39 SHA-1: f83ff93d5fa8bafc0066711adc3a91cfd45a3e87 SHA-256: f0993e6d2ea982f850dc135d541b2a36ef39bb7964330828f5398f95886694a9
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous external links, a technique often used for SEO spam or to redirect users to malicious sites. The document body mentions 'Calculator vault premium apk', suggesting a lure for downloading potentially unwanted software. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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://mx.grandsalinelibrary.com/uploads/1/3/0/4/130435592/130435592.html#calculator+vault+premium+apk
    • http://no-naturopaths.org/uploads/1/3/0/9/130969503/pisovosagar-mojupuli-semodukiweva-dizojagiwel.pdf
    • http://jacquelineaubin.com/uploads/1/3/0/6/130622024/tatedewemolipijuli.pdf
    • http://strkeandsucceed.net/uploads/1/3/0/8/130874082/zonejagigob.pdf
    • http://aimeegeorgia.com/uploads/1/3/0/4/130483759/9824176.pdf
    • http://nabeyamaidohawaii.com/uploads/1/3/0/2/130273623/1706ec4061711.pdf
    • http://jemstreats.net/uploads/1/3/0/6/130604285/f2e28.pdf
    • http://mindonthemoney.net/uploads/1/3/0/5/130588205/duxakabivurar.pdf
    • http://windrosecontabil.com/uploads/1/3/0/2/130274169/5558450.pdf
    • http://steinbachs.net/uploads/1/3/0/6/130604585/1687080.pdf
    • http://michellescreations.shop/uploads/1/3/1/1/131164538/6376923.pdf
    • http://wrapworthyoh.com/uploads/1/3/0/5/130589160/vopufowapoxirudu.pdf
    • http://myflippedclass.com/uploads/1/3/0/5/130540477/kafowumozowe-vepugubo.pdf
    • http://polishedpad.com/uploads/1/3/0/5/130551832/1519ea6.pdf
    • http://edmsm.com/uploads/1/3/1/3/131398525/pewukevetewikigigus.pdf
    • http://sharperpub.com/uploads/1/3/0/6/130640029/9aa8cb58b03bdab.pdf
    • http://polishedpad.com/uploads/1
    • 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_off000067e1.bin
e484fb7c0450acbac55452c485b051f0ca3db1313ca27e5e1af5d70d66a28ecf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67E1 8108 bytes

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