Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ad14c59ba15d9a7…

MALICIOUS

PDF

48.8 KB Created: 2020-05-03 22:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cf224ffc5434bd36b733c8f18450e2e3 SHA-1: 75e743acbb11f6a9d66d2897e2452f04ba5a3ca5 SHA-256: 7ad14c59ba15d9a70bd0d124dfa3cde9bc834cec16cd7e73468205a74e26a9bb
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

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 flagged this PDF as malicious with high confidence. These links likely serve as a link farm to manipulate search engine rankings or redirect users to potentially harmful content.

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://especialistassg.com/uploads/1/3/0/7/130740292/130740292.html#top+5+most+addictive+games+for+android
    • http://bldbilling.com/uploads/1/3/1/3/131380870/1310506.pdf
    • http://lotusventura.com/uploads/1/3/0/5/130588798/tumig.pdf
    • http://blahg-blahg-blahg.net/uploads/1/3/1/3/131397964/jawebe-lefut.pdf
    • http://jdmgallc.com/uploads/1/3/0/8/130813781/kumirukitaniki.pdf
    • http://osvconstruction.com/uploads/1/3/1/1/131164437/dujasugewajevubadaw.pdf
    • http://djlastminute.net/uploads/1/3/0/5/130541424/wepezilikuxozuna.pdf
    • http://enpointephysio.com/uploads/1/3/1/3/131398015/2016111.pdf
    • http://charterphysicaltraininginc.com/uploads/1/3/1/6/131607232/dolusixumujup.pdf
    • http://contentstrategies.net/uploads/1/3/0/6/130603696/5915087.pdf
    • http://lifeinourbubble.com/uploads/1/3/0/3/130379428/turugituxuwezek.pdf
    • http://trails4tailsnjpa.com/uploads/1/3/1/4/131453019/1365012.pdf
    • http://thetrumptroll.com/uploads/1/3/0/6/130604072/setuzagajomebanu.pdf
    • http://calvarylutheransthelens.com/uploads/1/3/1/3/131379325/9462054.pdf
    • http://bratrud.ca/uploads/1/3/0/6/130620267/kajedi_bekimimames_vataso.pdf
    • http://bellasmarketandgiftstore.com/uploads/1/3/1/3/131383562/fibujafisisex.pdf
    • http://upperarlingtonmusicacademy.com/uploads/1/3/0/7/130775501/fujenokor.pdf
    • http://qbaby1314.shop/uploads/1/3/0/8/130814931/382a082d6ed074.pdf
    • http://vaporlush.com/uploads/1/3/0/4/130483725/baveger-wajofolosi-wamojefix.pdf
    • http://theroomupstairs.org/uploads/1/3/0/6/130639877/3b02c3cfd83.pdf
    • http://aaliyakhan.com/uploads/1/3/0/2/130287992/wubizimagiri.pdf
    • http://apsupplychain.com/uploads/1/3/0/7/130740374/lijigo.pdf
    • http://materchristi518faithfulpeople.org/uploads/1/3/0/5/130539315/67bd9f2a5f04.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • 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_off00009350.bin
6f1e2d8ed0414e01ba4ce5f63dbba2c0122a1bde255c8868c101cfe35a3f2255		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9350 10756 bytes

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