Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa15ed7111ca288f…

MALICIOUS

PDF

38.2 KB Created: 2020-03-24 13:01:18 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1e1f69ed9d03178478367182758cbc33 SHA-1: 46c88e167aca520efdd16b560797a2ab365e40ce SHA-256: aa15ed7111ca288f8c3eb2c89e007d64007940d05020bb91ee5f6bf766d3ec92
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF 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 document body text is largely unreadable but contains a URL that is also present in the link farm. The primary attack pattern appears to be a link farm designed to manipulate search engine results or distribute further malicious content via the numerous linked PDFs.

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://jmj.construction/uploads/1/3/0/5/130540405/130540405.html#moda+de+los+80+hombres+ropa
    • http://mta-sts.mail.tobulaakimirka.lt/uploads/1/3/0/6/130620508/9ad2360ae19f92b.pdf
    • http://tripletmamas.com/uploads/1/3/0/6/130639924/fewelijegu.pdf
    • http://zazzletools.com/uploads/1/3/0/2/130291702/pidumawalamo_rerusovivunex_xirelepizafir.pdf
    • http://cryptothermal.com/uploads/1/3/0/7/130776158/cad5363e7c.pdf
    • http://corfuluxury.villas/uploads/1/3/0/7/130739596/f68003cc42.pdf
    • http://casamixreparos.com/uploads/1/3/0/9/130969011/vusuzinobejimo.pdf
    • http://duralumsiding.com/uploads/1/3/0/2/130291707/3c5b0.pdf
    • http://collision-specialties.com/uploads/1/3/0/8/130874276/zobixudu.pdf
    • http://missionarymark.com/uploads/1/3/0/6/130639452/godasin_lepevadamuzib_warusebunofoge_gegelobakaf.pdf
    • http://suleakaneko.com/uploads/1/3/1/0/131071220/vabagoxokogozet.pdf
    • http://jamessherwoodbooks.com/uploads/1/3/1/0/131070646/ninezijibelotelok.pdf
    • http://fuckgeese.com/uploads/1/3/0/6/130605175/9624e.pdf
    • http://skinny2strong.org/uploads/1/3/1/1/131163623/potopigusugikeg-wegib.pdf
    • http://beastmodepromo.com/uploads/1/3/0/2/130291922/7330451.pdf
    • http://joescottportfolio.com/uploads/1/3/0/4/130475959/xazagexuzobu.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.

FilenameKindSourceSize
font_00_sfnt_off00006cce.bin
fc1353733718af2a747dcd6ec05f7beff7b9b1551b4a5992f2e4c9ec05ba9a9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCE 8052 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.