Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eac899d90c0ba68…

MALICIOUS

PDF

36.1 KB Created: 2020-03-30 01:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ed0ee4b48ed7c5add219802676e0705a SHA-1: ad1ff96d8641a111faae238722ff96eafc12e6d1 SHA-256: 4eac899d90c0ba6893c3987298c56ddcb5331459b35074e8ed918f99419ddbf7
96 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to other PDF documents hosted on various domains. The ML classifier strongly indicates maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a mass external PDF link farm. The document body contains garbled text and metadata, suggesting it is not intended for human consumption but rather as a vehicle to host these links.

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://5pointauto.com/uploads/1/3/0/5/130546354/130546354.html#teoria+del+origen+unico
    • http://dijodohin.com/uploads/1/3/0/6/130639750/3196615.pdf
    • http://thetoptraveltrips.com/uploads/1/3/0/4/130483288/luludi.pdf
    • http://translationservicecenterllc.com/uploads/1/3/0/9/130969192/kirigoza_dijimukubogiso_gevumi.pdf
    • http://www.zuminstudios.com/uploads/1/3/1/4/131407694/bfb876a5a8afeb8.pdf
    • http://bhsfineartsboosters.org/uploads/1/3/0/2/130272592/4523597.pdf
    • http://cancercure-fund.com/uploads/1/3/0/7/130775342/wufenara_mibuvuxogat_neziguf_papap.pdf
    • http://catchcity.net/uploads/1/3/0/6/130639462/6888782.pdf
    • http://misfit-world.com/uploads/1/3/0/6/130639779/5d04143.pdf
    • http://tttaaaxxx.com/uploads/1/3/0/3/130323693/simupizu-gotuz.pdf
    • http://archesbrewinggallery.com/uploads/1/3/0/7/130739343/7726211.pdf
    • http://stittcrouse.com/uploads/1/3/1/1/131163788/rikoluluf.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_off00006451.bin
6a6ea9d199b54bafed342e040495f61ef47b3d0866342803e4e5cf477f724259		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6451 8360 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.