Malicious PDF — malware analysis report

Static analysis result for SHA-256 110091d4c9b47470…

MALICIOUS

PDF

81.9 KB Created: 2021-03-05 14:46:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: b34609c2fbf654c97e78529a70e8dd12 SHA-1: 80e08540aeaee828a4fe936b47d97c85247a2b9a SHA-256: 110091d4c9b47470828046a3c7d269740c903a56726eff12ecdace0976b33c80
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, with a primary one pointing to a site offering 'free movies on firestick', a common lure for phishing or malware distribution. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and a date, suggesting it was generated programmatically. The presence of many external URIs and link farm heuristics indicates a strong intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gimoguvi.ru/wix?keyword=watch+free+movies+on+firestick PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378393/normal_602498dec6e03.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497110/normal_5fcbf76e2a065.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368989/normal_6022915f92475.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413004/normal_5ff09920a93b9.pdfIn PDF document text
    • http://robinmani.site/lord_of_the_rings_trilogy_books_box_setffops.pdfIn PDF document text
    • http://molotkov.site/vidijoderigigupujuguxewfob50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467936/normal_601b57b7cd0eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480594/normal_601c5dadbfb04.pdfIn PDF document text
    • http://all-system7.xyz/central_park_lahore_map4woct.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/support.nintendo.com_error_code_23400xhftq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368951/normal_601935c67f5e6.pdfIn PDF document text
    • http://1offpark.xyz/mavorikusiropipeserkg5zv.pdfIn PDF document text
    • http://topmassage.net/dd_nolzurs_marvelous_unpainted_miniatures_young_black_dragonvctyn.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/ligeia_edgar_allan_poeriyti.pdfIn PDF document text
    • http://prizinsta365.website/20405720390hj9aw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414500/normal_60000501ba75b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_603340702b8ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420599/normal_600af582b1c7e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420604/normal_5fffb39a34146.pdfIn PDF document text
    • http://kindraretterath.com/53103934646hr56u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380090/normal_6040a101381ad.pdfIn PDF document text
    • http://kdghy.online/dilbar_new_3d_video_song3zuu2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF744 5012 bytes
SHA-256: 9f6425a4b339f6a2966d5cf8198f038ff168f7ca47da3c2fc83b6676a5148870
font_01_sfnt_off00010836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10836 10408 bytes
SHA-256: fac785453151d610fcb8d20af7111f002ddfeb23b21c3fcf8a189b94a7aaf31f
font_02_sfnt_off00012bda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BDA 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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