PDF malware analysis — malicious · ca3fcf4b9e8d5a80

MALICIOUS

PDF

39.4 KB Created: 2020-03-20 02:18:57 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: f3c0fab3d6450b5b84f9dee73a710142 SHA-1: db016784f567ffb2c33d1565f7217f3bfe347b6c SHA-256: ca3fcf4b9e8d5a8052799b7eb818a3fcd1cf4d2c706af6b8a9773b980ba8cec9

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly supports the malicious verdict. No scripts were extracted, limiting the ability to determine specific payload delivery or execution methods.

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://michaudwellness.com/uploads/1/3/0/7/130738507/130738507.html#convert+shapefile+to+kml+online
- http://plantationpestservices.net/uploads/1/3/0/2/130270899/18c496d0774624.pdf
- http://lesloupandises.com/uploads/1/3/0/4/130436494/zojumifimuliz-tisamixi-vazibifoj-fekilexonu.pdf
- http://us-arabchamber.org/uploads/1/3/0/7/130776779/lexuziziserokusi.pdf
- http://3vi5.com/uploads/1/3/0/8/130814101/repenijimisananewo.pdf
- http://www.cnccutting.lv/uploads/1/3/0/5/130588927/6471046.pdf
- http://nillumbikplumbing.com.au/uploads/1/3/0/8/130873738/ef679393.pdf
- http://luckyslandmaintenancellc.com/uploads/1/3/0/7/130775029/gogugekebufu.pdf
- http://lmichellecreate.com/uploads/1/3/0/8/130814258/tifonidemol.pdf
- http://www.homeschoolemanas.com/uploads/1/3/0/6/130620930/6069350.pdf
- http://vpmsilverbars.com/uploads/1/3/0/6/130620662/1d57c5e6.pdf
- http://barringtondrapery.com/uploads/1/3/0/5/130539370/jopegetur.pdf
- http://www.albatrossinv.com/uploads/1/3/0/5/130545493/golozit-sagukagulemif-dexeg.pdf
- http://jackbrucker.net/uploads/1/3/0/7/130775760/jelodo_kigodi_serimavo_saxukiz.pdf
- http://nitratodargento.com/uploads/1/3/0/6/130603944/386052498fba7c.pdf
- http://portfoliocultura.com/uploads/1/3/0/7/130740558/bamodifiwikunoxovu.pdf
- http://maritimeinsurancebrokers.net/uploads/1/3/0/5/130551764/bad44b2398.pdf
- http://aitparking.com/uploads/1/3/0/2/130289524/vozivitilidafurabow.pdf
- http://consumerscorporation.com/uploads/1/3/0/4/130435834/042f3b.pdf
- http://roguepilots.com/uploads/1/3/0/7/130775850/3f5c69be2ad.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00006f1d.bin` `3021b64211f008b02f628a47cf7f54e7ec562313db527afb7a67f0563068ddb4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F1D	8516 bytes

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