PDF malware analysis — malicious · 739fb2c089b17dcf

MALICIOUS

PDF

46.9 KB Created: 2020-04-06 04:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: 588df73de67dc0d1c8e0000a81c91d6d SHA-1: 5a2926d709e5e42afb8e7e7fc960cf02b6b3158a SHA-256: 739fb2c089b17dcff3ac92bebf6d10423bbc12a1ba98b2a9d59860f731a97dcf

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious intent to redirect users to potentially harmful content hosted on numerous domains.

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://ereksitahanlama.com/uploads/1/3/0/7/130775728/130775728.html#que+es+la+escuela+psicologica+estructuralista
- http://maddenlife.com/uploads/1/3/0/7/130775645/pemevad-wujofanufo.pdf
- http://realestatepowerconnection.com/uploads/1/3/0/6/130604336/jarenetu.pdf
- http://baylemmacockers.com/uploads/1/3/0/6/130639197/gukemukapopidufane.pdf
- http://paleocasts.com/uploads/1/3/0/2/130270843/nisinijori_sipelegovogiju.pdf
- http://josephrenee.com/uploads/1/3/0/7/130738567/1490529.pdf
- http://deceptivelysimple.com/uploads/1/3/0/2/130287302/razejosu.pdf
- http://melissaforkgenteaching.com/uploads/1/3/0/2/130287997/kipajumuxuzetu.pdf
- http://2ndchance-thriftstore.com/uploads/1/3/0/6/130605182/4342153.pdf
- http://musicteachersnj.com/uploads/1/3/0/7/130738989/f8a550171.pdf
- http://yogaindradevi.com/uploads/1/3/0/4/130476347/2574258.pdf
- http://allenhomestaging.com/uploads/1/3/0/9/130969334/40d712c688f.pdf
- http://thewholisticempire.com/uploads/1/3/0/7/130775382/bevowawebozeva.pdf
- http://one-driv-e-preview-tag.online/uploads/1/3/1/4/131406086/xurafumazozaja.pdf
- http://gracefoxshop.com/uploads/1/3/0/9/130969062/e3fadeb1e851.pdf
- http://konshensklean.com/uploads/1/3/0/5/130539111/3906036.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/
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007a85.bin` `fab5db980ed581c88b557f8ac982a7b761dbbd3beb9abcd992efff6e5d36653b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A85	7792 bytes
`font_01_sfnt_off00009776.bin` `779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9776	16036 bytes

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