Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9f49dc37e89ddb7…

MALICIOUS

PDF

42.0 KB Created: 2020-03-29 02:30:16 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3429d466c772f26676fbf477f5ffefcb SHA-1: aad374c68b44268bb246930b31eeb41fe245e12d SHA-256: b9f49dc37e89ddb76bbe9785a14f94bc2c5c34fff6f14af5761c5876d414f621
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm or SEO spam technique, likely intended to lure users into downloading malicious content by disguising it as legitimate educational material. The presence of a 'download button' heuristic further supports this, suggesting a deceptive user interface. The primary attack pattern involves leveraging these links to redirect users to potentially harmful sites or files.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://neokundalini.org/uploads/1/3/0/4/130477018/130477018.html#grade+3+eqao+math+booklet
    • http://ckandcobarbers.co.nz/uploads/1/3/0/4/130435524/riwigat.pdf
    • http://www.ponyexpressprints.com/uploads/1/3/0/6/130620929/vubanazexepalavu.pdf
    • http://sanfranciscomission.com/uploads/1/3/0/5/130544539/bewoko-sezitisuno.pdf
    • http://my-pof-online.com/uploads/1/3/0/3/130379380/4830243.pdf
    • http://mstumbo.com/uploads/1/3/0/4/130489159/8966592.pdf
    • http://carwynfinefoods.com/uploads/1/3/0/6/130604730/c6b92f50fd42.pdf
    • http://mx.starquarryfarm.com/uploads/1/3/0/9/130969624/953702.pdf
    • http://vigilservicesgroup.com/uploads/1/3/0/7/130775640/ddb2b264e3.pdf
    • http://www.rare-earth-hardwoods.net/uploads/1/3/0/7/130776589/4804427.pdf
    • http://betterbartlett.org/uploads/1/3/0/8/130814859/wogasenuze-jejak-nejeko.pdf
    • http://webmail.hansonhoneybee.com/uploads/1/3/0/6/130605217/3851476.pdf
    • http://karageorge.net/uploads/1/3/0/2/130289485/vorepuketulobisol.pdf
    • http://cheryllenard.com/uploads/1/3/0/2/130287553/2509190.pdf
    • http://dansdowntown.peterjamesclark.com/uploads/1/3/0/5/130588649/3ce379616912a9d.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006591.bin
e305131661577f6463ae7251be4a9d6ca237cb5d08bd4c220927f2ac92ad8808		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6591 7960 bytes
font_01_sfnt_off00008478.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8478 16036 bytes

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