Malicious PDF — malware analysis report

Static analysis result for SHA-256 96593ed69ddfdd9b…

MALICIOUS

PDF

51.6 KB Created: 2020-03-22 10:54:24 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1de10c64adf3992608b964ec20d4d71e SHA-1: effd21d025fb20f1686c0a0c9597d3ef997931cc SHA-256: 96593ed69ddfdd9b29aae193b63cda856d45af51bddcded6a506ef0155fc6bfe
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains a URL that points to a Spanish-language document, suggesting a potential lure. The primary function appears to be directing users to a vast collection of other PDF files hosted across numerous domains, likely for SEO poisoning or to distribute further malicious 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://naschberger.org/uploads/1/3/0/6/130639059/130639059.html#municipios+que+integran+la+region+olmeca+de+veracruz
    • http://tnbwebinar2018.com/uploads/1/3/0/6/130639959/gejoti.pdf
    • http://www.wentcentre.com/uploads/1/3/0/6/130604767/768c9.pdf
    • http://the-seafood-lady.com/uploads/1/3/0/4/130488539/5718dcf82.pdf
    • http://autodiscover.mnmsprinkler.com/uploads/1/3/0/5/130545636/dezonomepafudew.pdf
    • http://alicesdiscountshack.com/uploads/1/3/0/5/130539922/040372194a3fa7.pdf
    • http://sryoga.co.uk/uploads/1/3/0/4/130435862/mojijuw.pdf
    • http://montcoglass.com/uploads/1/3/0/8/130813448/5689358.pdf
    • http://switchpreston.com/uploads/1/3/0/8/130813966/a3e3e15bf9a.pdf
    • http://nedwaves.com/uploads/1/3/0/4/130488316/2784515.pdf
    • http://dallasphotoboothrent.com/uploads/1/3/0/5/130588762/zekewobe_zobuvub_tasofozoku.pdf
    • http://sunrisejewelrydesigns.com/uploads/1/3/0/7/130740344/2357000.pdf
    • http://580774685565887697.com/uploads/1/3/0/5/130540211/ccd7d1978746ba.pdf
    • http://fabricoftheearth.com/uploads/1/3/0/4/130489090/c3b4c027a56.pdf
    • http://triosdigital.com/uploads/1/3/0/7/130775199/vodajifok.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a75.bin
963d3ae0bb9848fbb544ff1b3b2425a453bba44d641252780ad87d20f183fee8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A75 9868 bytes
font_01_sfnt_off00008d8a.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8A 2652 bytes
font_02_sfnt_off000096c7.bin
3376dc2ee3b3ba7dc96c4473b4b68f69dc99311355330d936f40c7d6ed556278		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96C7 5656 bytes
font_03_sfnt_off0000a905.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA905 16036 bytes

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