Malicious PDF — malware analysis report

Static analysis result for SHA-256 452e125b7278c3ab…

MALICIOUS

PDF

43.7 KB Created: 2020-03-20 12:24:39 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f3f42a9799a0dc315ddc3a06d46f158f SHA-1: 477e6f8e16280136fd1474593acb0e787171d4c6 SHA-256: 452e125b7278c3abd36b0fd8756ab15cf64983ecddf63d88ac6e9dc3ae651f1c
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO manipulation or to distribute further malicious content. The heuristic PDF_SEO_LINK_FARM specifically identifies this behavior, indicating a malicious intent to redirect users to a large collection of other PDFs. The ML classifier also strongly flagged this sample as malicious.

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://blueridgebrittleco.com/uploads/1/3/1/1/131164023/131164023.html#20+oraciones+en+ingles+en+afirmativo+negativo+y+interrogativo
    • http://thebossbabenetwork.com/uploads/1/3/0/7/130776204/dokazanosinaj-wifekogegamawe.pdf
    • http://bplusriverranch.com/uploads/1/3/0/9/130969442/3245122.pdf
    • http://loissinko.com/uploads/1/3/0/6/130604355/mojexejedelujizuveko.pdf
    • http://securingcenter.com/uploads/1/3/0/8/130874533/28015.pdf
    • http://christinevanwalraven.com/uploads/1/3/0/7/130740504/pesiwe.pdf
    • http://mtdefender.com/uploads/1/3/0/2/130288571/genibizizesutej-xovilurefe.pdf
    • http://mail.michaelkelton.com/uploads/1/3/0/2/130287283/7175668.pdf
    • http://bulletsandbombs.com/uploads/1/3/0/5/130541186/paxabawuwo_kizategow_neputigukuje.pdf
    • http://splashbrosbargrill.com/uploads/1/3/0/6/130639693/filefowakuku.pdf
    • http://hostmaster.amaralashdesign.co.uk/uploads/1/3/0/5/130589322/9340400.pdf
    • http://neuracing.com/uploads/1/3/0/6/130621203/66c92989dc6.pdf
    • http://bakktchain.com/uploads/1/3/0/6/130620506/lezofogiporazo_derosojefujam_vugowoko.pdf
    • http://alpinelegendspixiebobs.net/uploads/1/3/0/8/130874314/kurujixod-vuxexera.pdf
    • http://www.dragomantalen.nl/uploads/1/3/0/7/130776134/wemakagav_ponav.pdf
    • http://www.lancelevinrad.com/uploads/1/3/0/6/130604640/7535656.pdf
    • http://cls2009.com/uploads/1/3/0/7/130740609/1935939.pdf
    • http://crystalspiritdesigns.com/uploads/1/3/1/1/131164573/11661eb.pdf
    • http://mtylerjordan.com/uploads/1/3/0/9/130970006/7455933.pdf
    • http://www.naturquita.es/uploads/1/3/0/5/130588596/ximevameki.pdf
    • http://btvhousecleaners.com/uploads/1/3/0/7/130775979/lijipolesibukozejew.pdf
    • http://www.fashion-rehab.net/uploads/1/3/0/5/130588382/3122950.pdf
    • http://downtownraleighhouses.com/uploads/1/3/0/7/130740112/suwuvesajadepokul.pdf
    • http://antoinetteshealingretreat.com/uploads/1/3/0/7/130739775/vusogiwemozurul.pdf
    • http://toursinvienna.com/uploads/1/3/0/6/130604621/8345037.pdf
    • http://contentment.one/uploads/1/3/0/4/130435914/49522.pdf
    • http://antoinetteshealingretreat.com/up
    • 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_off00007dd8.bin
0344b7113cb6fb3c40ccc039e4e771f5fe74e4be4f1c783843badcaf5b083dcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD8 8944 bytes

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