Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6b58948704d9c5…

MALICIOUS

PDF

40.4 KB Created: 2020-03-15 03:01:52 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c82449fd3650dcab0250e6e4bd76a9ba SHA-1: 97b77e55cc50a12d83d6c244385139a7080e5d95 SHA-256: cd6b58948704d9c567b0392edd8c892b0a3ce5747d5925486517a3e65e216d63
70 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are SEO-optimized and point to other PDF files, indicating a link farm. One of the embedded URLs, 'http://berkessa.com/uploads/1/3/0/6/130639916/130639916.html#antares+autotune+5+free++full+version', suggests a lure for downloading pirated software. The presence of a visual download button further supports this social engineering tactic. No scripts were extracted from this sample.

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://berkessa.com/uploads/1/3/0/6/130639916/130639916.html#antares+autotune+5+free++full+version
    • http://c3industriesllc.com/uploads/1/3/0/4/130435694/ronov-lekesovoravalif-xuzufodidef-zatat.pdf
    • http://bodycentralassignee.com/uploads/1/3/0/2/130289504/5392696.pdf
    • http://allured.es/uploads/1/3/0/6/130604340/jadujorogafi.pdf
    • http://casadeshenandoah.com/uploads/1/3/0/6/130605292/3bf63ad002fe.pdf
    • http://richmondnonsense.com/uploads/1/3/0/2/130273748/lokuzopakigewazi.pdf
    • http://www.zzportal.studio/uploads/1/3/0/7/130739910/4584309.pdf
    • http://www.cocomindbodywork.com/uploads/1/3/0/3/130323266/jerupekipasojozaguj.pdf
    • http://techniqueartist.com/uploads/1/3/0/5/130543106/didugene-kusazu-kovekipibibaf.pdf
    • http://balmingileadskincare.com/uploads/1/3/0/7/130739265/2202f0c75b262b.pdf
    • http://nimbus-realty.com/uploads/1/3/0/6/130604618/mivolomefetok.pdf
    • http://bestchoicetaxandfinance.com/uploads/1/3/0/5/130552097/cd70b45c826c482.pdf
    • http://christianbebrave.org/uploads/1/3/0/4/130490115/c5f7336bde73.pdf
    • http://lkngoldens.com/uploads/1/3/0/8/130874197/zesusopipotijerumu.pdf
    • http://lafayetteschoolrestoration.com/uploads/1/3/0/6/130621371/6918120.pdf
    • http://americanbuiltcabinets.com/uploads/1/3/0/8/130813614/xizekoxijukulevisid.pdf
    • http://www.jbkapp.com/uploads/1/3/0/2/130289519/nufomi.pdf
    • http://www.omrr.org/uploads/1/3/0/7/130776841/116266.pdf
    • http://mindfullmug.com/uploads/1/3/0/7/130775722/261231.pdf
    • http://www.aimmanagement.co.uk/uploads/1/3/0/2/130270776/7130807.pdf
    • http://www.bylisbon.com/uploads/1/3/0/6/130621859/1a2c1407ae6e.pdf
    • http://internationalaid.net/uploads/1/3/0/7/130740027/dabevifesonik.pdf
    • http://seattlecitylight.org/uploads/1/3/0/5/130588651/xevuzavutitemo.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_off000075da.bin
3427706df5c78b99ba0d0e3b179a37af2de0f4a4f739aa6fb3b5f7bc8c561516		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75DA 7732 bytes

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