PDF malware analysis — malicious · 017dc458d14d8b4e

MALICIOUS

PDF

40.2 KB Created: 2020-04-01 11:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)

MD5: 50ef94e854206f4a6ee70647d64ffc5a SHA-1: f74109cd667c1d98456fcccb6329e20aa186f685 SHA-256: 017dc458d14d8b4ed3c436955e3fc52271e9a987b1a8c037758a4f4e10942ba5

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains a large number of external links to other PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs suggest a link farm or content distribution network, likely intended to manipulate search engine results or serve malicious payloads.

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://amandakayser.com/uploads/1/3/0/4/130435888/130435888.html#fenomenos+cadavericos+conservadores+artificiales
- http://wellnessattheabbey.com/uploads/1/3/0/5/130539300/3260447.pdf
- http://lovebugco.org/uploads/1/3/0/7/130776230/98154.pdf
- http://dianabohan.com/uploads/1/3/0/6/130604552/risin-dudufob-deligotuwogafap-lomivajigezibi.pdf
- http://harbourhealthandwellness.com/uploads/1/3/0/7/130740092/likaduwigurivevupe.pdf
- http://conflictconnection.com/uploads/1/3/0/6/130639888/5c5088bb151.pdf
- http://raphmoreira.com/uploads/1/3/1/1/131163836/a4c05205a839.pdf
- http://anchoredinloveweddings.com/uploads/1/3/0/4/130483426/xusara.pdf
- http://thegatedsixspeed.com/uploads/1/3/0/7/130739918/88790eb.pdf
- http://world-with-elegance.com/uploads/1/3/0/4/130483836/9e5f3.pdf
- http://ilcerchiodellaluna.com/uploads/1/3/1/3/131379248/7040735.pdf
- http://dry-2-go.com/uploads/1/3/0/4/130478261/rinoponutagek_kawesani_jigiwobo.pdf
- http://busydentistsolutions.com/uploads/1/3/0/2/130270768/boworo.pdf
- http://vickiesworld.com/uploads/1/3/0/7/130776273/2041623.pdf
- http://hi-bequinevet.com/uploads/1/3/0/8/130874582/wepaxubi.pdf
- http://billing.themobilepcguys.com/uploads/1/3/0/7/130775936/83137.pdf
- http://metcalfchiro.com/uploads/1/3/1/4/131437079/3912518.pdf
- http://air168.net/uploads/1/3/0/3/130323341/nolamu-duxedejokutewuf.pdf
- http://statybuasas.lt/uploads/1/3/0/6/130604631/punasog.pdf
- http://nkshoporlando.com/uploads/1/3/1/3/131384536/bipibidirudo_furoposefule_doxagu_kujadubup.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_off00007321.bin` `c3d6e18174c1f2f90eb2532b669fa5319a771a5d9fca479c56da5e43ff67e800`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7321	8460 bytes

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