Malicious PDF — malware analysis report

Static analysis result for SHA-256 64dbe63f7212afb3…

MALICIOUS

PDF

85.0 KB Created: 2020-04-01 20:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3493016ed6c05ad0e51c8fed42cc20d6 SHA-1: 15e2335836dc01a87d48987758a2766fee2462e5 SHA-256: 64dbe63f7212afb3a65b9ac4c5b120347e7de4216a95712966501c283e00600e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which are dynamically generated and point to other PDFs, indicating a link farm or SEO spam campaign. The document body is heavily obfuscated but contains a URL that further supports the lure to external content. No scripts were extracted, but the presence of numerous external links suggests a phishing or malicious redirection attempt.

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://ontarioresume.com/uploads/1/3/0/7/130739475/130739475.html#fonema+r+suave+eliminar
    • http://basicbeautybyvittoria.com/uploads/1/3/0/5/130590314/damadawo-vibulov-gotowedevos-zisexarux.pdf
    • http://www.expressprinting915.com/uploads/1/3/1/3/131379824/d4a0c6a.pdf
    • http://cretecapital.com/uploads/1/3/0/8/130814803/7898973.pdf
    • http://wakeforestfence.com/uploads/1/3/0/5/130550688/latoze.pdf
    • http://soapytoad.com/uploads/1/3/0/6/130621284/48598913dd57.pdf
    • http://shaneelliscoatesportfolio.com/uploads/1/3/0/3/130313177/3912796.pdf
    • http://biggerpicture.us/uploads/1/3/1/3/131379181/kajedatoxupen.pdf
    • http://aivets2018.eu/uploads/1/3/0/6/130639691/3732946.pdf
    • http://apiarium.eu/uploads/1/3/0/4/130483479/9187672.pdf
    • http://acraftyday.ca/uploads/1/3/0/7/130740440/5319486491.pdf
    • http://mobulamanta.org/uploads/1/3/0/4/130483275/jodemikat_sabaranaselu_tobodudateliwul.pdf
    • http://tradergreat.net/uploads/1/3/0/5/130539517/rokum.pdf
    • http://surreymobilepetgrooming.com/uploads/1/3/0/9/130969445/49cce37a75288.pdf
    • http://fisbanga.com/uploads/1/3/0/7/130739373/4349967.pdf
    • http://ozarkzenhandmadesoap.com/uploads/1/3/0/6/130620690/8a3e3.pdf
    • http://finfrockaviation.com/uploads/1/3/0/4/130475966/78035.pdf
    • http://humblehustleclothing.ca/uploads/1/3/0/3/130323835/0f2dd4f9c560a.pdf
    • http://this-andthat.com/uploads/1/3/0/8/130813972/tufawisemipo.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_off00010d10.bin
f2687c7301de063bf12c873df533235449d84a834ebadcf30776068b944e0f08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D10 9820 bytes
font_01_sfnt_off00012fb8.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB8 16036 bytes

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