Malicious PDF — malware analysis report

Static analysis result for SHA-256 f66c1d94db21fd21…

MALICIOUS

PDF

71.0 KB Created: 2020-04-05 13:16:32 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 08e3300d076a16f1782cf49984968670 SHA-1: 547aa96682d84f4473134451aefaa22361e4b6e9 SHA-256: f66c1d94db21fd214e6b2d5b59f956496276aa68c3cd7d0d3f1322c9de7b83c7
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files hosted on similar domains, indicating a link farm or SEO abuse tactic. The document body, though partially corrupted, contains a URL that appears to be a lure. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious link distribution scheme.

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://lereveildesetoiles.com/uploads/1/3/0/7/130740387/130740387.html#conclusion+del+voleibol+en+venezuela
    • http://roxiticustech.com/uploads/1/3/0/8/130814017/5774875.pdf
    • http://hhicoc.org/uploads/1/3/0/6/130605077/c8c29d9630ea19.pdf
    • http://serviceoftheplan.org/uploads/1/3/0/6/130621801/regenaziva.pdf
    • http://nativeplantslivehere.org/uploads/1/3/0/5/130588159/458167e5c757.pdf
    • http://jreglobal.com/uploads/1/3/0/4/130436252/513729d5e2bd66.pdf
    • http://bellechalet.com/uploads/1/3/0/8/130813325/8a81ad9aff8d.pdf
    • http://youmakeitibreakit.com/uploads/1/3/0/4/130489159/mumib.pdf
    • http://insuranceservicesofglynn.com/uploads/1/3/0/4/130491063/xebavubafixavid-bebaluke.pdf
    • http://plikk.net/uploads/1/3/0/4/130488688/6e9dedef.pdf
    • http://houstoncarpetcleaning.org/uploads/1/3/0/8/130814193/rojodob.pdf
    • http://blushbyupdos.com/uploads/1/3/0/7/130740596/gazavogigaxolu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbb1.bin
2b4002a0b471e9ebcf9ab7c73815311e09b83d98fb743db168aae17b183efea9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB1 1912 bytes
font_01_sfnt_off0000d476.bin
043104ded9d494c3cbc3a7d826b82ffcbca8d7d2e6e15cd6d934bbae8d6b1879		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD476 9852 bytes
font_02_sfnt_off0000f78b.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF78B 16036 bytes

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