Malicious PDF — malware analysis report

Static analysis result for SHA-256 f694fb3003271bc2…

MALICIOUS

PDF

36.9 KB Created: 2020-03-29 07:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c9afcafcd0a88487e21bbdcdf71c89b8 SHA-1: 0e88bd7cb93ae3631cd8a7ec3e2f506ebc76d814 SHA-256: f694fb3003271bc207566a0256a6e36211f87a1bf58331b34e8dd1ecd8011761
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, many of which are numerically or generically named PDFs, suggesting a link farm or SEO abuse tactic. The document body text mentions 'New York State form RP-5217' and includes URLs that appear to be part of this lure. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of numerous external links designed to manipulate search engine results or direct users to potentially harmful content.

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://rebeccalaplacaattia.com/uploads/1/3/0/6/130621467/130621467.html#new+york+state+form+rp-5217
    • http://newrisestrategy.com/uploads/1/3/0/7/130740316/585311.pdf
    • http://balloonfashionshow.eu/uploads/1/3/0/8/130873930/872ec840a8.pdf
    • http://sofialemann.com/uploads/1/3/0/7/130739034/gexivitofekeremof.pdf
    • http://terracorprealestateservices.com/uploads/1/3/0/7/130775992/d64958d60.pdf
    • http://janethaworthnaturopath.com/uploads/1/3/0/6/130640090/seroxajuwe.pdf
    • http://triumphantlawnandlandscapeservices.com/uploads/1/3/0/8/130874085/db79eedf0.pdf
    • http://nederland-verzilvert.nl/uploads/1/3/0/2/130272101/kurexor.pdf
    • http://sweetangelskettlecorn.com/uploads/1/3/0/5/130540021/9107016.pdf
    • http://rooflocators.com/uploads/1/3/0/6/130604524/1352890.pdf
    • http://trainingcenterchurches.com/uploads/1/3/0/3/130379561/6490404.pdf
    • http://sociology180aalmodovarfinal.com/uploads/1/3/0/6/130621209/fevelulusira.pdf
    • http://4x4unlimited.com/uploads/1/3/0/4/130475923/moloti-befejanujet-zukedi-bapepewa.pdf
    • http://choptallybarber.shop/uploads/1/3/0/6/130622116/rerik.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_off000067e0.bin
5db6520a83c40694a8c00ac9f0a07bfadae2d3bf05c494c76fb89a7044ab0937		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67E0 7928 bytes

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