Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f47a9f4dd46cd03…

MALICIOUS

PDF

41.1 KB Created: 2020-05-13 13:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 984346361c0ea3c6f8962793d9308c2d SHA-1: 082d16f169dba19edf02c5f4b5615992a420b1e6 SHA-256: 9f47a9f4dd46cd03067c6237b73558de91d94af656ed452ee36a9e83a7a8425e
92 Risk Score

Malware Insights

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

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 strongly indicated maliciousness. The embedded document text, though garbled, contains references to URLs and appears to be part of a link farm strategy. The primary purpose seems to be directing users to a multitude of external sites, potentially for SEO spam or to host further malicious content.

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://michaudwellness.com/uploads/1/3/0/6/130621506/130621506.html#the+imperfect+tense+in+spanish+worksheet
    • http://carolinalakehouse.com/uploads/1/3/1/4/131454696/b187520a.pdf
    • http://mysjgroup.com/uploads/1/3/0/2/130287991/c43a91.pdf
    • http://247marketingusa.com/uploads/1/3/0/5/130539449/7454224.pdf
    • http://aeverest.net/uploads/1/3/0/6/130639214/3627392.pdf
    • http://jerrysrenovationsllc.com/uploads/1/3/0/8/130874318/3ada5598532.pdf
    • http://protectivehorsesolutions.com/uploads/1/3/0/7/130739026/21cc19bb37a7bf.pdf
    • http://dedicated2learning.com/uploads/1/3/0/9/130969683/17d1a17128a977.pdf
    • http://paulakiiveri.com/uploads/1/3/0/7/130776533/5267e11620.pdf
    • http://budgetrollershutters.net/uploads/1/3/1/4/131437379/5da94b95544a0.pdf
    • http://thestonepile.com/uploads/1/3/0/7/130740292/ropojevalotazux_pukomo.pdf
    • http://seanstrong.net/uploads/1/3/1/3/131398374/kijafuwibe.pdf
    • http://pointlomabaseballacademy.com/uploads/1/3/0/7/130738616/69f366.pdf
    • http://cpallenconsulting.com/uploads/1/3/0/5/130589064/zodawo.pdf
    • http://mavemontajes.com/uploads/1/3/1/3/131383820/8364755.pdf
    • http://earthspiritpress.com/uploads/1/3/1/4/131455508/xafujos.pdf
    • http://poolcleanershunstville.com/uploads/1/3/1/4/131454567/tilegadi.pdf
    • http://lovethecity.net/uploads/1/3/0/6/130639533/3317275.pdf
    • http://heartandsoulbirth.com/uploads/1/3/0/2/130270987/pololoti_pugerunutoxudof.pdf
    • http://503nutritionfitness.com/uploads/1/3/0/2/130291910/ba0da71cf77d01.pdf
    • http://yongda-machine.com/uploads/1/3/1/6/131637103/vafalaxesaj.pdf
    • http://blakheart.com/uploads/1/3/0/5/130590305/9126955.pdf
    • http://hotfoxfitness.com/uploads/1/3/1/4/131438248/4785238.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_off0000714c.bin
baf5d9198e1fb355c86f1d36e105bd85b93a334a2d32563adf50be1356040775		 pdf-font-stream PDF embedded font (sfnt) at offset 0x714C 11980 bytes

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