Malicious PDF — malware analysis report

Static analysis result for SHA-256 048a2fdd12a55d94…

MALICIOUS

PDF

49.0 KB Created: 2020-05-24 15:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a1f9ed5c98666f871f045820617fe08 SHA-1: 5bbeeb2bc873ca5f2d46ec5100890290087b2b09 SHA-256: 048a2fdd12a55d94861c25a9ce07d95aa52def1c3966d44bbd58ad7805712361
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the sheer volume of outbound links to potentially malicious or compromised sites is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://aivl4l.salon225.com/uploads/1/3/0/8/130874513/130874513.html#significado+nombre+brillit+mendler
    • http://voxelmill.com/uploads/1/3/0/6/130621915/5667849941fa5.pdf
    • http://whatifitsscience.com/uploads/1/3/1/4/131437612/357865.pdf
    • http://congosynergyconsultingforum.org/uploads/1/3/1/6/131606127/fumupug.pdf
    • http://fourhealthstore.com/uploads/1/3/0/6/130621238/1333546.pdf
    • http://ajproperty.net/uploads/1/3/1/4/131455283/mabelofumofetujus.pdf
    • http://comeoutinbusiness.com/uploads/1/3/0/2/130288709/7167877.pdf
    • http://majesticcasa.com/uploads/1/3/0/8/130873784/lifodiwiberel.pdf
    • http://high-country-villas.com/uploads/1/3/0/8/130873840/189515.pdf
    • http://mysticnavigator.com/uploads/1/3/0/5/130539179/kevoruburujene_mifix.pdf
    • http://zendowneast.com/uploads/1/3/1/3/131380138/rububiwipasaf-norupatidomeror-mamatake.pdf
    • http://wealthmanagementteam.org/uploads/1/3/0/2/130289270/xowox-kugimimawiw-wixofeva.pdf
    • http://pvpconstruction.net/uploads/1/3/0/2/130272985/wukizekun-sazesiveve-bukozowibev.pdf
    • http://abphotographie.ca/uploads/1/3/1/0/131070911/a1bd941107fcb7f.pdf
    • http://admin.kyliemariephotography.com/uploads/1/3/1/3/131379045/b2d6520a06.pdf
    • http://westcoastwebleads.com/uploads/1/3/0/2/130274151/3042559.pdf
    • http://theyogauniversity.org/uploads/1/3/0/2/130272512/pibawitizu.pdf
    • http://mastravel.es/uploads/1/3/1/3/131384279/mivivav_vukovozu.pdf
    • http://solservice.it/uploads/1/3/1/4/131438110/7275677.pdf
    • http://justifiablefitness.com/uploads/1/3/1/3/131383645/tipexafefudirobewu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008212.bin
6730fb6aded262fd6867b04ad728ae5790b11321e274ffd70b3f059ddd4fa235
pdf-font-stream PDF embedded font (sfnt) at offset 0x8212 3156 bytes
font_01_sfnt_off00008d57.bin
edf2c44b83f1d2a2c5ee339f8510c02241118007fc6fff703bad88f75e8f4343
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D57 12800 bytes