Malicious PDF — malware analysis report

Static analysis result for SHA-256 6033e11882ddb6f4…

MALICIOUS

PDF

75.8 KB Created: 2021-03-21 10:38:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: bf5b258ca73c25558e4d329c92fd3352 SHA-1: 47f638c2b5350ea082374c72ce27c5b7222868ab SHA-256: 6033e11882ddb6f4e00a2ca69b4a7580c8d62990f08094fa0c949f73f23c28e3
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users. One prominent URL, 'https://dugedepap.ru/wix?keyword=heroes+of+order+and+chaos+mage+item+build', suggests a lure related to game item builds. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent. While no scripts were directly extracted, the PDF structure and numerous external links are indicative of a phishing or redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://dugedepap.ru/wix?keyword=heroes+of+order+and+chaos+mage+item+build PDF link annotation
    • http://jakartapro.xyz/xavodozakaradovifirime0a8n6.pdfIn PDF document text
    • http://jerimujolegem.medianewsonline.com/53445617976.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504870/normal_603b988d8dc79.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/how_to_use_presto_electric_skillet.pdfIn PDF document text
    • http://noxaduva.mypressonline.com/design_of_rcc_and_steel_structures_notes.pdfIn PDF document text
    • http://raisinshub.pro/vazebonodozixepu1lty1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452846/normal_600c0256ece57.pdfIn PDF document text
    • http://cccckkkkkdd.space/2000_ford_ranger_3.0_v6_flex_fuel_mpgzb36m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415302/normal_5fe89a8940e34.pdfIn PDF document text
    • http://busivel.xyz/bitawetefafuzutuvimuz2jbo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_6045c69b065af.pdfIn PDF document text
    • http://kinorio5.xyz/3d_sketchup_free_download_20178jyv5.pdfIn PDF document text
    • http://fajufoturesu.sportsontheweb.net/37719028094.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/2cdd6f63-bf17-4b3c-af02-69ff1f075fb0/33943910839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/603cb8a3-9768-4bee-b184-9d191cde321d/6483269321.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/create_json_string_c_newtonsoft.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_off0000ea61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA61 5536 bytes
SHA-256: b61e035e4a2584bee32c74d1a322060207a4ebdda424e3a4505dc3ab0680e77c
font_01_sfnt_off0000fd05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD05 10736 bytes
SHA-256: a39f0fa0007e9380443d7be40db78b3b4fd73205bee3ab701943968c5f2b3758

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