Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cfc64c78d1e7d9d…

MALICIOUS

PDF

80.9 KB Created: 2021-06-06 16:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a62ce313d976163ee771a25b7d5a2fa7 SHA-1: 0f749c9702afb1b31825a2fc17cdececd7c5b3aa SHA-256: 4cfc64c78d1e7d9d077faa7eb962956247d8b4c6f98678326370126785343cdc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical finding for a link farm containing numerous external URLs. The ML classifier and ClamAV also identified it as malicious. The primary malicious URL identified is https://botokaw.ru/123?utm_term=cross+platform+games+ios+ps4, which is likely part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/123?utm_term=cross+platform+games+ios+ps4
    • https://cdn-cms.f-static.net/uploads/4415531/normal_5fdbb4349a16f.pdf
    • https://supipujijasof.weebly.com/uploads/1/3/0/7/130739476/mazipi-nigilabika.pdf
    • https://rupokolox.weebly.com/uploads/1/3/0/8/130813141/2767693.pdf
    • https://vozuviwugil.weebly.com/uploads/1/3/2/6/132681927/fejojarokaxoj_bebubixa_nalodagipap.pdf
    • https://cdn-cms.f-static.net/uploads/4456982/normal_5fd1ab9372f44.pdf
    • https://talokawibameze.weebly.com/uploads/1/3/4/0/134000376/32aa730.pdf
    • https://fibepuranes.weebly.com/uploads/1/3/4/0/134041348/c63f423.pdf
    • https://kapaboni.weebly.com/uploads/1/3/4/5/134597735/1555798.pdf
    • https://wutikivefuripiz.weebly.com/uploads/1/3/4/6/134662644/14244026d1629.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8c1bc43b-6a2b-4230-ab38-2077178e2597/cloud_native_application_reference_architecture.pdf
    • https://uploads.strikinglycdn.com/files/9484b55a-14e2-4b01-b2a9-bf59eca65929/himnos_dela_iglesia_de_jesucristo_delos_santos_delos_ultimos_dias_descargar.pdf
    • https://uploads.strikinglycdn.com/files/198e01f7-bf95-468a-af6b-f7550a6cdf2a/6141784242.pdf
    • https://uploads.strikinglycdn.com/files/54346dd1-9889-471c-b83f-7a8c06260cb4/pokafudafeka.pdf
    • https://uploads.strikinglycdn.com/files/0f52d1ef-4ec0-486c-8977-86faee76d943/how_to_know_if_motherboard_and_processor_are_compatible.pdf
    • https://uploads.strikinglycdn.com/files/82da666d-c13d-46eb-80d6-638322eed604/the_count_of_monte_cristo_character_sketch.pdf
    • https://uploads.strikinglycdn.com/files/a96b2988-c443-4bf0-ae77-4c6a2fb5a99a/eren_x_mikasa_x_armin_fanfic.pdf
    • https://uploads.strikinglycdn.com/files/d0b6d195-7995-4e77-87c0-295a834a2af7/master_forge_outdoor_kitchen_reviews.pdf
    • https://uploads.strikinglycdn.com/files/6908b0cd-aa1b-4524-bee6-3d112a076364/pelozujimax.pdf
    • https://uploads.strikinglycdn.com/files/c1664fc4-ccf7-4f93-a725-f5c9918c9ef4/85221766627.pdf
    • https://uploads.strikinglycdn.com/files/6e143eb6-3b51-457c-8bf8-917d6e7a77ea/how_do_i_claim_my_nespresso_welcome_gift.pdf
    • https://uploads.strikinglycdn.com/files/bbc2bab6-fdac-453e-bb48-2e42f41a2200/c_programming_basics_in_tamil_download.pdf
    • https://uploads.strikinglycdn.com/files/0d32ffd3-e9ae-4bd3-b07e-dabd072d30a7/84680442723.pdf
    • 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_off0000ffd5.bin
ee64095f130969a229f5c97f8b057ee3b1e23c6fb4c6a042d3019b437cbaf2a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD5 5216 bytes
font_01_sfnt_off00011183.bin
dfecfb9e22f85e8116ac3559a6bc08ebe67bccc4afee5aa8595884afaee9c809		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11183 10724 bytes

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