Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ebd9fa9b459333…

MALICIOUS

PDF

91.5 KB Created: 2021-03-18 18:54:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 00de4ecf540ec9da1d32731e67b46617 SHA-1: 74aa34e354f2bcc9807400abd1d4454d6a8250ea SHA-256: 95ebd9fa9b459333cac9d6ffe5aa01d9ad9bede37090e829caf5afe12dbd2741
156 Risk Score

Malware Insights

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

The sample was identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many pointing to benign PDFs, suggesting a link farm or SEO poisoning attempt. The primary malicious URL identified is https://fokemale.ru/award?keyword=society+and+culture+pdf, which is likely used to redirect users to further malicious content. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://fokemale.ru/award?keyword=society+and+culture+pdf PDF link annotation
    • https://cdn.sqhk.co/subogutaze/IieQzjc/rakexawapasusalolego.pdfIn PDF document text
    • https://cdn.sqhk.co/fewoxenovof/giU07jd/xukegufepaxuvuzen.pdfIn PDF document text
    • https://cdn.sqhk.co/pobumepova/hoQyfyO/tumumiwotumoralitegurafe.pdfIn PDF document text
    • https://cdn.sqhk.co/waximanodif/1mFjahf/retained_profit_dividends_balance_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/famazipow/VjivXkz/boom_beach_hack_app_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/nolovojawek/Kiijajc/pottery_wheel_for_beginners_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/Nhfhhgf/alchemy_wars_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/xogixute/giAjeV7/allen_8_movie_theatre_farmington_nm.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/gg3C5gh/country_music_charts_august_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/norejasiwiza/Ygfwgdc/83843024847.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bivanud/juraxuziwali.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxegu/zoom_g1xon_guitar_processor.pdfIn PDF document text
    • https://43dda2ad-fadc-418c-a2d5-4b96cca2ed60.filesusr.com/ugd/6eca9c_a7017bf852d24d1186dc90520710ee13.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/consternation_and_distress_crossword_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/kubedukowug/35465445651.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/jufekinexuloxevib.pdfIn PDF document text
    • https://580b68e3-2104-4118-ae5b-4f285de1c062.filesusr.com/ugd/dad7b5_e1430ed028174abb8375c0ea93393054.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/93535559883.pdfIn PDF document text
    • https://e9abb47e-19e5-4ec2-9f3c-2aa4e6f2bf0a.filesusr.com/ugd/92be99_2b2a2d0564e0420fbe38cc6156e27912.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/farowug/sennheiser_ew_100_g2_frequency_range.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/buderus_gb062_service_manual.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_off00012b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B5A 5176 bytes
SHA-256: 08d9a3a177a6fcdb1580107f42601c18a6721f556ea8ff00ea3a27fda0923118
font_01_sfnt_off00013d13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D13 10428 bytes
SHA-256: b6e1e9119eebc550a9903fe4aa37484b61f5d85cc3817912bc88bf38a4fd89a3

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