Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbaf02321e5d8171…

MALICIOUS

PDF

41.3 KB Created: 2020-03-20 13:02:09 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0771fdfe7cfbc194ccc927329daeb483 SHA-1: 3adeaed0cba5bbf7f4496adbb5f244b5907b479f SHA-256: cbaf02321e5d8171be0f54940bc7836153fd9f37f2a0824c3355f139228175d7
92 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a specific rule for SEO link farms. The document body contains numerous URLs pointing to external PDF files hosted on a variety of domains. The primary attack pattern appears to be SEO poisoning or a link farm designed to redirect users to potentially malicious content. No scripts were extracted, limiting the analysis of direct payload delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://shannondelaney.com/uploads/1/3/0/4/130483350/130483350.html#armadura+caballero+caido
    • http://normaniclothing.com/uploads/1/3/0/5/130589371/ziluxerobakuxeno.pdf
    • http://overheadmichigan.com/uploads/1/3/0/5/130590564/c64d81c70be35c.pdf
    • http://beyondthesticks.com/uploads/1/3/0/5/130590714/5337638.pdf
    • http://partywife.net/uploads/1/3/0/7/130775737/9918344.pdf
    • http://surpass.mv/uploads/1/3/0/7/130739263/9672976.pdf
    • http://polestartechnologyassociates.com/uploads/1/3/0/4/130435985/bisomug_dorawapavika_fomerupeje.pdf
    • http://hostmaster.connet.it/uploads/1/3/0/2/130273801/zavonuw.pdf
    • http://dtdealer.com/uploads/1/3/0/8/130814900/7512199.pdf
    • http://natashadavid.com/uploads/1/3/0/5/130539926/lovobusivaza-defupe-sanajaxajuna.pdf
    • http://walldo.com/uploads/1/3/0/4/130435555/1236959.pdf
    • http://foodforestfarmwest.com/uploads/1/3/0/7/130740292/kirejiwumegot_daxupatew_vujateletija_bikeviviporewos.pdf
    • http://pleasantvalleybeekeeper.com/uploads/1/3/0/5/130589223/6230b3abc.pdf
    • http://www.thefinestgourmetsalts.com/uploads/1/3/0/6/130621950/6c7fc9036f.pdf
    • http://arsxystica.com/uploads/1/3/0/2/130289158/2121880.pdf
    • http://www.uniteweekend.com/uploads/1/3/0/3/130313053/4404040.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_off0000783d.bin
a6b7cd06afb190a06fd61bbba4c616cbf546dad97b5e8b187172e58efa67e863		 pdf-font-stream PDF embedded font (sfnt) at offset 0x783D 8424 bytes

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