Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccac2d69963709c9…

MALICIOUS

PDF

80.4 KB Created: 2021-02-02 11:46:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f44eeb36035d5e987bf05b2b73b97114 SHA-1: b628639d3c62f5da2413a860eb809ea0bada3ae5 SHA-256: ccac2d69963709c9be4f0640c1cb1ef0622e266314e821c87411a0675dbc1450
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded URLs, many of which point to disposable hosting and appear to be part of a link farm designed to redirect users. The ML classifier strongly indicated maliciousness, and the presence of a 'download button' heuristic suggests a lure to download a payload. The document's content, though heavily obfuscated, likely serves as a pretext for these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 https://jacksth.ru/aws?utm_term=java+jdk+8+version PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446781/normal_5fccb20a9ed12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415308/normal_5fc90c87609b8.pdfIn PDF document text
    • https://mavuweginu.weebly.com/uploads/1/3/2/6/132681431/6580910.pdfIn PDF document text
    • http://instasurprise.online/nefobosodizutazuvikcucz.pdfIn PDF document text
    • https://vudolexululuj.weebly.com/uploads/1/3/1/0/131070894/d903b02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403140/normal_5fd18a6fcb278.pdfIn PDF document text
    • http://huaweistoreukr.xyz/42556367685owh84.pdfIn PDF document text
    • https://kewegiru.weebly.com/uploads/1/3/1/4/131438086/lanijutibezi.pdfIn PDF document text
    • https://belexikezetuvom.weebly.com/uploads/1/3/0/7/130775063/27d6b37f.pdfIn PDF document text
    • https://cdn.sqhk.co/gabamulijawe/gfkih8c/lemefirunedam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484169/normal_5feb8ce718d49.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kevatudoritek.rf.gd/14879214242.pdfIn PDF document text
    • http://foweroboxufafuv.epizy.com/behavior_chart_template_printable.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC8 5172 bytes
SHA-256: a9b425806d70c432ce9f3be122f5be718a6df02aa0ed33d51ac01e14cd2c236a
font_01_sfnt_off00010d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7E 11408 bytes
SHA-256: a09fddb98ee289368ba21dde63a88614d591c9ec3774d6596b11751bb9cdf3dd

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