Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9fa272a7d8668b2…

MALICIOUS

PDF

40.7 KB Created: 2020-03-08 09:43:22 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 19e72319283fc73ce25b589a096b50c9 SHA-1: e774f92611ff986596f17a015f149f32fd31e878 SHA-256: a9fa272a7d8668b2e59567f424f57cd53fc7ab5ffb0e46328149eafac9a259f6
94 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are numerically or generically named, suggesting a link farm or SEO spam tactic. The document body, though partially corrupted, contains text related to 'Alagappa university distance education fees details' and references the wkhtmltopdf tool, indicating a lure to potentially malicious websites. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a 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://myentouragemusic.com/uploads/1/3/0/5/130545636/130545636.html#alagappa+university+distance+education+fees+details
    • http://qisma-game.com/uploads/1/3/0/7/130740149/9510736.pdf
    • http://www.centicore.eu/uploads/1/3/0/7/130776452/nasupikerup.pdf
    • http://www.plussizebridalsct.com/uploads/1/3/0/5/130547024/cc4cfef7bbf146.pdf
    • http://municipio79.org/uploads/1/3/0/6/130639327/bometuzogu-muvowuvexopigis.pdf
    • http://billelenbark.net/uploads/1/3/0/3/130323411/8088200.pdf
    • http://www.yuanhl.com/uploads/1/3/0/6/130604338/7faefa.pdf
    • http://www.vaughnchapelmbc.com/uploads/1/3/0/9/130968906/jijazodomat.pdf
    • http://mail.sandblast-arts.org/uploads/1/3/0/5/130589061/bb169ef3fa0f0.pdf
    • http://alexistrucking.com/uploads/1/3/0/4/130476069/7a7ef7fc39ba57.pdf
    • http://assure.la/uploads/1/3/0/2/130288542/laposisitudi.pdf
    • http://precisionfashioninstrument.com/uploads/1/3/0/7/130739614/8eb0c76d622bbf9.pdf
    • http://www.binhamvillagehall.com/uploads/1/3/0/7/130775939/xugaribogopado.pdf
    • http://www.kcfoodsnobs.com/uploads/1/3/0/4/130483318/ae121ba68f742.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_off0000730d.bin
67eb6a65c09beeaedc335ba207b6d897dc7af7c037c1daa2d30326c3fa10a5bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x730D 8528 bytes

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