Malicious PDF — malware analysis report

Static analysis result for SHA-256 414845e1911ab577…

MALICIOUS

PDF

37.4 KB Created: 2020-04-11 11:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d0fbec8fb09e2903a518543b42011783 SHA-1: 5606aa1a07ab27cee1f1a7edb4e7eaf18a274e1b SHA-256: 414845e1911ab577f8459ac0a41ea36fed2121001b4691f5376c7e6fbabdc89f
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. One of the primary external URIs extracted is http://misssoutheastpageantry.us/uploads/1/3/0/8/130874592/130874592.html#adjective+complement+worksheets+with. The ML classifier also strongly indicated maliciousness. This suggests the document is part of a link farm or SEO abuse scheme, potentially to distribute further malware or engage in phishing.

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://misssoutheastpageantry.us/uploads/1/3/0/8/130874592/130874592.html#adjective+complement+worksheets+with
    • http://hopehealthacademy.com/uploads/1/3/0/5/130590410/db7b882.pdf
    • http://theroom.club/uploads/1/3/0/8/130874141/kozobejawetuk.pdf
    • http://ac-creative.co/uploads/1/3/1/4/131453522/fegovobobepodux.pdf
    • http://bringyourblackexcellence.com/uploads/1/3/0/4/130477613/04c657.pdf
    • http://airwavetest.com/uploads/1/3/0/4/130478760/3861113.pdf
    • http://artofmoses.com/uploads/1/3/1/4/131407036/golebawusar.pdf
    • http://migrationmileswf.org/uploads/1/3/1/4/131453049/bamomozirosar-rizol.pdf
    • http://ashaconstructions.org/uploads/1/3/0/7/130739480/4680444.pdf
    • http://weigaonano.com/uploads/1/3/0/7/130776641/lelojage.pdf
    • http://ayearofadventures.com/uploads/1/3/1/3/131398204/munodo.pdf
    • http://niveditainstitutions.com/uploads/1/3/1/4/131437333/ec05b1d32b87f4.pdf
    • http://gjnewcomers.com/uploads/1/3/0/7/130739947/4516794.pdf
    • http://ayearofadventures.com/uploads/1/3/1
    • 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_off00006b19.bin
609aa414288dbb129e3fc46dd2f450c750b913df4c16e46c0a9dbdad285cdfcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B19 8180 bytes

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