Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c323be5d092a48…

MALICIOUS

PDF

57.4 KB Created: 2020-07-08 15:24:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ded09aa5f25bfb6bed5dc6233682db40 SHA-1: 5f41a435737c9a2c58b635917df7c5a633488b92 SHA-256: 01c323be5d092a487edaa1989d4ffcdf8a2fa34532953555e909d2eee802425e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The primary link directs to a known malicious redirector, suggesting an attempt to lead the user to a malicious site. The document body, while containing a worksheet title, is largely obfuscated and serves as a container for these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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 https://ttraff.com/wb?keyword=grams/moles%20calculations%20worksheet%203
    • http://files.carolinastormhedgehogs.com/uploads/1/3/1/6/131637291/fanipewonosewagafuv.pdf
    • http://files.wilcoprevention.org/uploads/1/3/1/4/131437740/29b296.pdf
    • http://files.nomadunplugged.com/uploads/1/3/0/7/130776578/tezemoxod.pdf
    • http://files.sandaharrboerboels.com/uploads/1/3/2/6/132681566/6896535.pdf
    • http://files.thetlacademy.shop/uploads/1/3/1/3/131384789/dupive-madelubupazape-dezarekinoza.pdf
    • http://files.vicenzas-crostoli.com/uploads/1/3/1/4/131483253/9062675.pdf
    • http://files.statebirdtogo.com/uploads/1/3/2/7/132710687/a1b067.pdf
    • http://files.broken-kingdom.com/uploads/1/3/1/0/131070523/6982908.pdf
    • http://files.businessbcs.com/uploads/1/3/2/7/132740343/e9c81eaa854.pdf
    • http://files.thesolidrockshop.com/uploads/1/3/0/8/130813797/zaxisufibuxuxigusi.pdf
    • http://files.jenniestrobel.com/uploads/1/3/1/3/131383959/nines.pdf
    • http://files.edsworldwide.org/uploads/1/3/2/7/132740320/sotilemiz-gukixedesimujar-bevulas-lativeponeji.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://getakoridun.files.wordpress.com/2020/07/weletodovuxosixedelikib.pdf
    • https://biwapatevav.files.wordpress.com/2020/06/xavakulonesigaf.pdf
    • https://tatusane.files.wordpress.com/2020/07/93189070550.pdf
    • https://molisapezu.files.wordpress.com/2020/07/82772381018.pdf
    • https://taxasegino.files.wordpress.com/2020/06/ramabafibomisuzavajak.pdf
    • https://futidufesag.files.wordpress.com/2020/07/kabidizakebisox.pdf
    • https://tipavabo.files.wordpress.com/2020/06/89442725504.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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000800c.bin
a7d50e03a480b79013c0192058fa7dc0742e501bdc0402e3bf13773fda43474f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x800C 5308 bytes
font_01_sfnt_off00009207.bin
6aa2441a28df25c0756c1e810f49e96e36a147df5c94b73396669d75b44663ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9207 15072 bytes
font_02_sfnt_off0000c12b.bin
a2ccb5d48230d7d8f448e6249ab49e399f57495b0900213d943f46bdfb0efea6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC12B 16092 bytes

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