Malicious PDF — malware analysis report

Static analysis result for SHA-256 15cba21187ab3592…

MALICIOUS

PDF

50.3 KB Created: 2020-03-12 02:49:05 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: efe3d784f2236adc2e74655deeca1bd4 SHA-1: 3dc7c5e274f288c2f4f92fabc723a2e825d5dc2e SHA-256: 15cba21187ab35928992533f6ebd57371aee0fa70d24e05c5331729ec2614a55
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by an ML classifier and contains a large number of external links, characteristic of a link farm. The primary function appears to be directing users to a multitude of other PDF documents hosted on various domains. The specific content of the linked documents is unknown, but the sheer volume and the nature of the domains suggest a malicious intent, possibly for SEO manipulation or to distribute further malware.

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://stylemerentals.com.au/uploads/1/3/0/4/130483232/130483232.html#t.+pallidum+particle+agglutination+assay+%28tppa%29
    • http://viajeszafra.es/uploads/1/3/0/9/130969851/177623f01c860.pdf
    • http://ratificationofthe19thadmendment.com/uploads/1/3/0/2/130291766/vomonamom.pdf
    • http://lesstoluv.com/uploads/1/3/0/2/130291658/figag.pdf
    • http://wheredoyouwanttogoforlunch.com/uploads/1/3/0/7/130776810/1309891.pdf
    • http://juvefc.club/uploads/1/3/0/6/130604229/xawuf_banodupivap.pdf
    • http://cpanel.rellaworks.com/uploads/1/3/0/5/130540477/9663109.pdf
    • http://sunhillots.com/uploads/1/3/0/2/130287738/6042904.pdf
    • http://mr-castironcreations.com/uploads/1/3/0/6/130604620/4461650.pdf
    • http://mail.eoleaphotography.com/uploads/1/3/0/4/130489297/rorakisanigu_povewakolesilug_kokuzibojamar.pdf
    • http://buildmaui.net/uploads/1/3/0/5/130539797/9056621.pdf
    • http://hollybabiarz.com/uploads/1/3/0/2/130271045/4696577.pdf
    • http://southshoredoor.com/uploads/1/3/0/4/130491488/nufokawamir.pdf
    • http://redcloudanimalhealth.preview.pethealthnetworkpro.com/uploads/1/3/0/7/130739038/tofufu-pojegujijuka-kokujuz.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000087f7.bin
d10b996feeb24948587a5f4b137f72c095fa3ea329f18cc792591c925cdc26c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87F7 7900 bytes
font_01_sfnt_off0000a68b.bin
918c713e504bc6b81d02c1a2255754a401ac2abc541e8dad89e45abd643b90c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA68B 16048 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.