PDF malware analysis — malicious · ac1688e6e72b9e70

MALICIOUS

PDF

47.3 KB Created: 2020-03-26 02:32:08 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: a73487fbde99a0cf0fb5902556af7ae4 SHA-1: 6f13fdafede4af99d41e507693779a39355a00ee SHA-256: ac1688e6e72b9e709c45a20e9304bd94297fff6abc8991c6689636ffacbd8fea

92 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 to other PDF files hosted on various domains. This pattern is indicative of a link farm, often used for SEO manipulation or to distribute malicious content. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, and the document body is heavily obfuscated, but the presence of numerous external links is the primary indicator of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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
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://retroskoda.com/uploads/1/3/0/4/130436252/130436252.html#configuracion+electronica+del+cobalto
- http://dwmfoundation.org/uploads/1/3/0/7/130775630/6232330.pdf
- http://haroldhopkinson.com/uploads/1/3/0/4/130435895/zarejisego_mopivefugaluk_tenegeko.pdf
- http://herononline.net/uploads/1/3/0/6/130620217/lolotiko.pdf
- http://picocita.com/uploads/1/3/0/4/130477009/1597726.pdf
- http://jawphysio-perth.com.au/uploads/1/3/0/2/130272438/5273524.pdf
- http://maxenergysolutions.com/uploads/1/3/0/4/130489241/pozirobenajebo-bujivitufij-batufowe.pdf
- http://thermalinterrupt.com/uploads/1/3/0/2/130272606/gajaxojesemibake.pdf
- http://www.inspirecoders.net/uploads/1/3/0/8/130814229/lovofimeraxif-vusaf-nigomusazoz.pdf
- http://domoliseo.com/uploads/1/3/0/4/130477661/bakomage_kimuniwafap_lunonuzusetisuv_doripebitimu.pdf
- http://casagaia.net/uploads/1/3/1/0/131070332/a8fffbc59fe.pdf
- http://pmpclones.com/uploads/1/3/0/5/130539255/poxufu_mekawozubon_nuwuvugivagew.pdf
- http://thebpstation.com/uploads/1/3/0/2/130287875/lepozegepis-pojonotoge.pdf
- http://gabrielagower.com/uploads/1/3/0/3/130379065/mamuvuwiruzef.pdf
- http://noon2moon.com/uploads/1/3/0/6/130603709/8936497.pdf
- http://www.bevilleflighttraining.com/uploads/1/3/0/6/130639438/kiludoziza_lebubexutuvepi_noxokolekezo_viwije.pdf
- http://iandavidwallfantasyauthor.com/uploads/1/3/0/7/130739016/fidasujakodas_sajipepobet_mufilurutij_tilokigagowa.pdf
- http://ketoboxie.com/uploads/1/3/0/7/130740391/motivufina_parizomumomiku_niduresu_sawusazoze.pdf
- http://nackaboss.fr/uploads/1/3/0/2/130272606/rarawaguridedusobir.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00007025.bin` `5ee23f4e9b31a98298d5f28f70293c8326ff11dbb8c757bd74928ee88b4760b1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7025	8392 bytes
`font_01_sfnt_off00008f0b.bin` `e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F0B	2652 bytes
`font_02_sfnt_off00009874.bin` `779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9874	16036 bytes

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