PDF malware analysis — malicious · ba25894475f88cb5

MALICIOUS

PDF

51.4 KB Created: 2020-03-29 08:04:36 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: f169b47c011703f552ca091e88fb623b SHA-1: a674111bf8ff036e2e59ef1aa94ff6ebcfbbe527 SHA-256: ba25894475f88cb566fd4a21d87c7475ddcaa88ae1f1e7ff73607cf3fdbd6037

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to PDF files hosted on various domains. One of these links, 'http://74-123-76-213.mgwnet.com/uploads/1/3/1/4/131437306/131437306.html#incredible+journey+movie+trailer', is presented as a movie trailer, suggesting a social engineering lure. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent. The presence of numerous SEO-like links suggests an attempt to distribute malicious content or phishing pages.

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://74-123-76-213.mgwnet.com/uploads/1/3/1/4/131437306/131437306.html#incredible+journey+movie+trailer
- http://wintersplumbingllc.com/uploads/1/3/0/2/130270747/8321834.pdf
- http://spookumout.com/uploads/1/3/0/7/130776760/xokaguxa.pdf
- http://sunriseroasters.com/uploads/1/3/0/5/130542972/6979722.pdf
- http://revisnotes.com/uploads/1/3/0/5/130589275/ae00fafc4a94.pdf
- http://mail.hebron-umc.org/uploads/1/3/0/8/130874042/ralavaziganeke-jevusud-gevuraxatuvet.pdf
- http://scbconsultoria.com/uploads/1/3/0/5/130542948/57830.pdf
- http://cpanel.2texasdips.com/uploads/1/3/0/4/130483184/simoju_wopazugomufoxux_tefumobugini_namazagire.pdf
- http://buzzybeestudio.com/uploads/1/3/0/6/130639055/dadasekuxobogokejom.pdf
- http://pantsbysamstore.com/uploads/1/3/0/5/130540699/gerevudunitow_kugatavudiwozu_lusupez.pdf
- http://kevin938.net/uploads/1/3/0/4/130477346/kodajututedire.pdf
- http://mkthinkhumanimpact.com/uploads/1/3/0/7/130775805/kedutexuxo.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
`stream_007_off00009bc8.bin` `f0e06e0c7ede7d0ed17d501d10d070d5081dc1decb47368f44f8fa7a131d5d39`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x9BC8	20092 bytes
`font_00_sfnt_off00007112.bin` `869c86ed29c1d0e4e0eff106514f540902aabd09f21fb74b9baca57c344f0a6b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7112	8744 bytes
`font_01_sfnt_off00009295.bin` `83d89f79375f7f339e88070a8779324ce221c94923bff415e388e162fbc46cfe`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9295	2604 bytes

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