Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c30f52867db4d93…

MALICIOUS

PDF

41.2 KB Created: 2020-04-04 13:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d426c9adb6b3a1bedc39ff05ffb66182 SHA-1: a2f7be6e552a6da902df5db9233f9167d7e9ac43 SHA-256: 3c30f52867db4d9306d0200949243acb14a3c65a3f42f7eddf0a269933b663c2
94 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, a technique commonly used for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the presence of numerous links to unrelated domains supports this assessment. No scripts were extracted, and the document body was heavily obfuscated, but the link farm heuristic is a strong indicator of malicious intent.

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://dragonbeautysupply.com/uploads/1/3/0/6/130620512/130620512.html#how+to+make+good+rap+lyrics
    • http://thetoiletwhisperer.com/uploads/1/3/0/7/130776350/xefon-dupoxoduj-sonabiwutegi.pdf
    • http://preschoolmusicclasses.net/uploads/1/3/0/8/130814788/1236674.pdf
    • http://writewordsbyrosalinda.com/uploads/1/3/1/3/131384135/zujuzilaw.pdf
    • http://mobius-pictures.com/uploads/1/3/0/5/130539185/2786328.pdf
    • http://prosounddownload.com/uploads/1/3/0/5/130551967/budodatanemeze-teluvaru.pdf
    • http://sdatasystems.us/uploads/1/3/0/6/130640042/nedesuni-jepemakiwe-jegedememaluba.pdf
    • http://smoothjazzisrael.com/uploads/1/3/0/4/130475936/0ce73de1.pdf
    • http://reallyboldlandscapes.com/uploads/1/3/0/2/130287915/7994963.pdf
    • http://fridas.org/uploads/1/3/0/7/130739658/3219898.pdf
    • http://choosewhentowork.com/uploads/1/3/0/9/130969580/35cb130333.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_off000078f3.bin
4f82a18a4f26d7bf41f8209f808cd7992cc138e3a7ec762d843002fa98233c3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F3 8136 bytes

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