Malicious PDF — malware analysis report

Static analysis result for SHA-256 753145856424a0fa…

MALICIOUS

PDF

43.1 KB Created: 2020-03-27 06:06:16 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7450aaed3ea286d763b7a9ce75438ff2 SHA-1: eec29a1a1ac05bf198c2f89cb3425b0642d95016 SHA-256: 753145856424a0fadddf929fc9072225a84d00798d001b017b5bbe7fcd0efc5b
96 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links to external websites, many of which are structured as PDF files. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass linking of external PDFs, suggesting a spam or phishing campaign. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the structure and numerous external links point towards a malicious intent to redirect 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://houseofgrns.com/uploads/1/3/0/7/130738567/130738567.html#tactical+rifle+drills
    • http://digitalsystemresearch.com/uploads/1/3/0/6/130620804/d5a3e06d94.pdf
    • http://cartergilmorecollection.com/uploads/1/3/0/6/130604538/525371.pdf
    • http://catawbamarijuanalawyer.com/uploads/1/3/0/3/130313836/00db9179ec8a.pdf
    • http://aluminumpipehouston.com/uploads/1/3/0/3/130379386/03172facaec6151.pdf
    • http://carestreamdl.com/uploads/1/3/0/2/130288542/5d80a37d1bd3.pdf
    • http://lightnewlegacies.com/uploads/1/3/0/5/130550785/c4e86461bf.pdf
    • http://ulash.store/uploads/1/3/0/2/130273884/nubanibasosopukof.pdf
    • http://divineprovidenc.com/uploads/1/3/0/3/130313262/7044618.pdf
    • http://www.shop.thegrillhousecompany.com/uploads/1/3/0/7/130775440/fb639cd.pdf
    • http://www.palomaville.com/uploads/1/3/0/7/130739766/3139796.pdf
    • http://youarenotaloneproject.com/uploads/1/3/0/2/130288468/2b7ad260e7c.pdf
    • http://brandofysiocenter.fi/uploads/1/3/0/5/130588864/rekevobinizu-kufixirugino-zurokagab-malumekugobaju.pdf
    • http://clevelandjerseyframing.com/uploads/1/3/0/4/130489926/mamavukoka.pdf
    • http://parceriaturismoetransportes.com/uploads/1/3/0/7/130775251/xezad.pdf
    • http://rbstudiosgroup.com/uploads/1/3/0/8/130813643/71d0b96b392.pdf
    • http://mgtconstruct.com/uploads/1/3/0/7/130739086/909c98fab9fdd.pdf
    • http://www.adamlalondebodine.com/uploads/1/3/0/8/130813134/miloxubijinawi.pdf
    • http://ghosh-lab.com/uploads/1/3/0/2/130289338/f7b33030.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_off000080f5.bin
cd178f7397a5034db08faf24f9838fcd78eaa1f37bdedfa2b4f59c00268cafe1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80F5 7804 bytes

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