Malicious PDF — malware analysis report

Static analysis result for SHA-256 086da34749860d6d…

MALICIOUS

PDF

69.0 KB Created: 2020-11-07 00:53:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 035f86ad831077df8e9805ccf559836b SHA-1: af3b379ee4210b09083a3ea7789ee62bea474bb0 SHA-256: 086da34749860d6dc8e21cd7f1461d92fe2d61c703af2341cfa4f4e3cfaf796f
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to disposable hosting services, indicating a link farm designed to distribute traffic. One of the primary links directs to a known malicious redirector, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://ggtraff.ru/123?keyword=pokemon+bot+auto+catch In PDF document text
    • https://puvovajol.weebly.com/uploads/1/3/4/0/134040332/tijuweli.pdfIn PDF document text
    • https://kowepesabileb.weebly.com/uploads/1/3/4/6/134635017/277028a011.pdfIn PDF document text
    • https://xuzutewoduka.weebly.com/uploads/1/3/4/3/134364923/6c0eb48fa992cd.pdfIn PDF document text
    • https://sowuwiwegekop.weebly.com/uploads/1/3/4/4/134444151/6681804.pdfIn PDF document text
    • https://dabagurujor.weebly.com/uploads/1/3/4/3/134350609/bijitimupon_repuni.pdfIn PDF document text
    • https://jakemujilofadam.weebly.com/uploads/1/3/1/3/131380171/b20ebaed.pdfIn PDF document text
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/8217374.pdfIn PDF document text
    • https://lufavipipoj.weebly.com/uploads/1/3/4/5/134580953/3b8b785ed.pdfIn PDF document text
    • https://tupipukevoluda.weebly.com/uploads/1/3/4/0/134041298/50c17bbd6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5257cd3b-be0d-4e36-833a-22c19015604d/zumowevotonibidudasemuki.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/keyboard_alt_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/94727240790.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/97690557415.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000dc78.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDC78 24432 bytes
SHA-256: 233b68f6bf95ed40f4ddcae14c61a00e7014aaae244e967b867fee9783ff16cf
font_00_sfnt_off0000972e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x972E 4940 bytes
SHA-256: cd9dee97d0161c71fffadd2dafb6460c3a71ee36f0f8c3166ae7a3b30dec76b5
font_01_sfnt_off0000a7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7D5 2756 bytes
SHA-256: 759f03d7a4cc25768a10f3fb7821e44af966dffd009e802315926da34cdd0d7d
font_02_sfnt_off0000b406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB406 11792 bytes
SHA-256: f942b905dbb4511decac6b3c4b63cfda8bb276b9a5f27e9a674f0bfc6c47439d

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