Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5b7f2dea115ab17…

MALICIOUS

PDF

41.5 KB Created: 2020-05-05 03:51:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ef8ef6d7d7060525ab66ed4dba6f6b2d SHA-1: 8022990ce95f5fdf0c9ec6cc77518ccbbcb41a93 SHA-256: f5b7f2dea115ab1743b2b551b64cb5136bb5a737efe6169671f4ec717ae164d9
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on different domains. The ML classifier also strongly indicated maliciousness. This suggests the document is designed to redirect users to potentially harmful content or to manipulate search engine results.

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://bricdesign.com/uploads/1/3/1/3/131379111/131379111.html#google+play+store+app++apk
    • http://beautybehindbars.org/uploads/1/3/0/6/130620371/ramefuxixef.pdf
    • http://orendagametables.info/uploads/1/3/0/4/130483507/nipogigerosawuw.pdf
    • http://ohanajo.org/uploads/1/3/0/7/130775744/7d3fb.pdf
    • http://area-arqueologia.info/uploads/1/3/0/8/130814297/e049c68.pdf
    • http://bodyblissdepot.com/uploads/1/3/1/6/131606807/fujosibafatogewuduna.pdf
    • http://creating-space.ca/uploads/1/3/0/9/130969368/tawunojep-xirokufaw.pdf
    • http://georgewhitneyhomes.com/uploads/1/3/0/6/130621045/bae6b01b.pdf
    • http://theporchvaldosta.com/uploads/1/3/0/7/130740073/2925035.pdf
    • http://bowlingballlocker.com/uploads/1/3/0/9/130968911/2589052.pdf
    • http://trakkersllewellins.com/uploads/1/3/0/6/130621084/xupidudidowa_kumasabitelubi.pdf
    • http://bobodigitalmarketing.com/uploads/1/3/0/6/130604114/3418516.pdf
    • http://emsadlcr.com/uploads/1/3/0/7/130775521/noxavipagugegar.pdf
    • http://milkwood.wales/uploads/1/3/0/6/130621066/7515357.pdf
    • http://uwhrsociety.com/uploads/1/3/0/6/130620841/3695212.pdf
    • http://3500industrialroad.com/uploads/1/3/0/3/130312916/bofolaremani.pdf
    • http://druidrisingreiki.com/uploads/1/3/0/3/130323641/484653.pdf
    • http://pandebundles.com/uploads/1/3/0/5/130551416/zowibi.pdf
    • http://joelscriven.com/uploads/1/3/1/4/131437421/f177ff5d6f.pdf
    • http://battleoftheboardgames.com/uploads/1/3/0/3/130312965/7473768.pdf
    • http://officialphilbruce.com/uploads/1/3/0/2/130289229/2519219.pdf
    • http://galleriesbyjulissa.com/uploads/1/3/0/2/130271016/nikij.pdf
    • http://fremergrupo.com/uploads/1/3/0/7/130739192/678c1bc3e1.pdf
    • http://comms108lafond.com/uploads/1/3/0/3/130312914/5504880.pdf
    • http://speakvegangr.com/uploads/1/3/0/5/130546243/cff8af.pdf
    • http://ephemeralbeing.com/uploads/1/3/0/2/130289510/fuwefumamadupota.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • 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_off0000775f.bin
73931e15fc496182011aa03d17f4981db26b8149739b5b3dc9ae524697c61578		 pdf-font-stream PDF embedded font (sfnt) at offset 0x775F 10416 bytes

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