Malicious PDF — malware analysis report

Static analysis result for SHA-256 0521810d198ba575…

MALICIOUS

PDF

42.3 KB Created: 2020-04-06 07:40:09 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 37dbae2bade6b8d26d766885b88d5c09 SHA-1: 651ee219c6f50d3b9621019d184404e19d28b0f5 SHA-256: 0521810d198ba575d397d307bf5653417f7506d4794ecb3edaf519abab32dfa9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. These links point to various domains, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the sheer volume of outbound links is highly suspicious.

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://themeditationcollective.net/uploads/1/3/0/6/130640003/130640003.html#efemerides+de+la+semana+del+6+al+10+de+mayo
    • http://livingearthlandscapesltd.com/uploads/1/3/1/1/131163738/6356803.pdf
    • http://fortunatedogcookies.com/uploads/1/3/0/4/130476733/popemalavalusod_safovezama_gafezudepez.pdf
    • http://debrios.com/uploads/1/3/0/2/130287867/f63e3ee836d21.pdf
    • http://utzgroup.org/uploads/1/3/1/1/131163865/nopoxuviwu-gawijumotasoted-denig.pdf
    • http://phonadic.org/uploads/1/3/0/7/130775400/dotavivoxe.pdf
    • http://hillbillynationalbank.com/uploads/1/3/0/5/130588956/badebarifu-diwis-wolikow.pdf
    • http://kbtinting.com/uploads/1/3/0/8/130873943/3627920.pdf
    • http://soulatthebeach.com/uploads/1/3/0/8/130814129/4f2fbd1d7f.pdf
    • http://accuratecardiocare.com/uploads/1/3/0/6/130621225/getofovaroveviguled.pdf
    • http://realtyfinancialplanning.com/uploads/1/3/1/0/131071159/vovijikuxujon_wabugisewelu_wifebo.pdf
    • http://humanityatlast.com/uploads/1/3/0/3/130323311/kozojugosuf.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_off00007afa.bin
0b0df17230c16ac9866ae5b11201ef367f5dd0ae2461ba80746794a0b2bb3351		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFA 8784 bytes

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