PDF malware analysis — malicious · 70faaea3e2150001

MALICIOUS

PDF

50.1 KB Created: 2020-04-05 08:57:15 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: fd95ef0c6a3592eea17c25e3f68bcc07 SHA-1: 1fd1d399fa717d532a38e475c14cb7833be4e129 SHA-256: 70faaea3e215000145956d1499edf9515d1e235832f75c7e9783328f64e54245

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a 'link farm' heuristic. The ML classifier strongly indicates maliciousness. While no scripts were directly extracted, the presence of numerous external URLs suggests the document is designed to redirect users to potentially malicious sites, possibly for SEO spam or to host further malicious content.

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://allstarscreenprint.net/uploads/1/3/0/2/130291838/130291838.html#100+nanomolar+to+millimolar
- http://zanzibarhope.com/uploads/1/3/0/3/130379841/8814351.pdf
- http://anesia.net/uploads/1/3/0/6/130604632/19df70d0c8.pdf
- http://chirecjmun2019.com/uploads/1/3/0/7/130739614/4651953.pdf
- http://lorarivera.com/uploads/1/3/0/5/130588850/joxisojudolo.pdf
- http://burlingamenailstudio.com/uploads/1/3/1/3/131379873/dumixitobel.pdf
- http://flinthammer.com/uploads/1/3/1/3/131382232/7502621.pdf
- http://subtlesurprise.ca/uploads/1/3/0/5/130589072/wumewojunumalis_xarafiposasapi.pdf
- http://wldconsultants.com/uploads/1/3/0/8/130874030/1481259.pdf
- http://modehealthandfitness.com/uploads/1/3/0/2/130272387/neletel.pdf
- http://heybkln.com/uploads/1/3/0/8/130813269/8991946.pdf
- http://wptwwc.com/uploads/1/3/0/5/130539341/fobagubelufef_pokuworetofivi_nowalena.pdf
- http://bmcproperties.org/uploads/1/3/0/8/130874358/fujivofeka.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- 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/
- https://fedoraproject.org/wiki/Licensing/LiberationFontLicense
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000076a3.bin` `baf75e1fee5b5b949f8092f564c8846fe8af0748bda018acd4c8fb26364405de`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x76A3	9192 bytes
`font_01_sfnt_off000099cf.bin` `8d553ccbc9c4939c5a8898a0b77d3dde1e2d52d3bb24e9c2fac2d9e498a41ab0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x99CF	3408 bytes
`font_02_sfnt_off0000a563.bin` `fe1987dbbf51069f1c0594b634fd7317b30e62354eba990938c2cbd113c19688`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA563	16124 bytes

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