Malicious PDF — malware analysis report

Static analysis result for SHA-256 702d15d8490f73f9…

MALICIOUS

PDF

73.1 KB Created: 2021-03-21 23:00:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0c81af6ace7b70a792cf77726cdad7b SHA-1: 72dfe286028e316dcc2368b8056b9f6ff0eb3e79 SHA-256: 702d15d8490f73f907d55fd1d16ab7b00e5a89397255b4f46309c3713ef95c36
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to manipulate search engine results. One prominent URL, 'https://midufefew.ru/wix?keyword=world+of+warcraft+ultimate+visual+guide+updated+and+expanded+pdf', suggests a lure related to a popular game, likely to entice users to click and potentially download further malicious content or be directed to a phishing site. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/wix?keyword=world+of+warcraft+ultimate+visual+guide+updated+and+expanded+pdf
    • http://rogevunesopu.medianewsonline.com/xobofaruvun.pdf
    • https://cdn.sqhk.co/fijufupuga/icgeba8/bbose_marksheet_photo.pdf
    • https://cdn.sqhk.co/kepilujofeje/IExgehc/66702937591.pdf
    • https://cdn.sqhk.co/puvubuzu/GGQjhhg/fegomopufukixafopitesu.pdf
    • https://cdn.sqhk.co/rekewuneboxu/iibihia/4479965300.pdf
    • https://cdn-cms.f-static.net/uploads/4490725/normal_6029cb7175675.pdf
    • http://tujidal.mypressonline.com/brainstem_stroke_syndromes.pdf
    • https://cdn-cms.f-static.net/uploads/4378405/normal_60446d853a431.pdf
    • https://cdn.sqhk.co/foropogajag/hfgfheK/luzawagikifuwixogigipi.pdf
    • https://cdn-cms.f-static.net/uploads/4401555/normal_602ad8aa30e6f.pdf
    • https://static.s123-cdn-static.com/uploads/4422150/normal_6008eadd1b3f3.pdf
    • https://cdn-cms.f-static.net/uploads/4474727/normal_600bb9029eac6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_c7054cbf713b4efca7b421a1bbe618c2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/51d668e0-11d3-4758-ad7e-41513d46bb59/goodwill_drop_off_near_me_covid.pdf
    • https://uploads.strikinglycdn.com/files/dbfc0b17-dd3c-449a-b058-52c77fb0b70a/the_star_of_bethlehem_full_movie.pdf
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_6b334921b61c4b3e8c6d9a90f010adc9.pdf?index=true
    • http://dowuvoduwitovos.atwebpages.com/i_wish_you_more_writing_activities.pdf
    • https://f77c8dad-41d7-4a8f-8d8d-c05149a3a236.filesusr.com/ugd/36d413_faa40d0d2afd48648e233130a88279e0.pdf?index=true
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de37.bin
89152ef589216d11f08721301e72e2d85b93d5ac57c07bd6947ef78d4674f35c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE37 5708 bytes
font_01_sfnt_off0000f1b1.bin
deb732f1edeae8c98ddd26029fa814fa45a5422eca4f04033c28c6554d101371		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B1 10816 bytes

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