Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c319bd8fe81537…

MALICIOUS

PDF

46.3 KB Created: 2020-03-29 06:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1f38b0d186151d0bd35048cc5c8a3edd SHA-1: d5e288ffdafdea22bdc0546f9236893b9c9b1f59 SHA-256: 32c319bd8fe81537cb45b99645501ac1cbd70b36b819c24031d4adcd7a2ff3ef
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are numerically or generically named, suggesting a link farm for SEO manipulation or to host malicious content. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to URLs that are likely part of this link farm, indicating a deceptive lure.

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://myentouragemusic.com/uploads/1/3/0/2/130272282/130272282.html#metodo+de+estudio+biblico+devocional+pdf
    • http://911-podarok.site/uploads/1/3/0/6/130603887/somid.pdf
    • http://brandonkew.com/uploads/1/3/0/7/130740596/duzusorifovori.pdf
    • http://theyshouldhavebeennice.com/uploads/1/3/0/6/130604500/ae1a4bcc1.pdf
    • http://ritualcoffeebar.com/uploads/1/3/0/6/130604188/wafenosudeposep.pdf
    • http://www.biju-design.com/uploads/1/3/0/3/130324248/078ab39b919.pdf
    • http://empowerrealtyaz.com/uploads/1/3/0/3/130313634/5629934.pdf
    • http://gotopten.com/uploads/1/3/0/3/130313433/lazodetofon.pdf
    • http://asphaltarmor.net/uploads/1/3/0/6/130621422/ab4b0539.pdf
    • http://woodlandacresarabians.com/uploads/1/3/0/7/130775252/3221288.pdf
    • http://countrylanegardens.org/uploads/1/3/0/2/130271072/30f9c7ccc53201.pdf
    • http://widowmakerbrewingstore.com/uploads/1/3/0/6/130603888/mixukipimoluvunofa.pdf
    • http://mrncleaningservicescom.com/uploads/1/3/0/8/130813478/jedipisaruraku.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_off00008bb2.bin
9acb17934c53f874b50bca641b49012d48e6730e6bd89e9fd74e1498e0a17b3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB2 8904 bytes

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