Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe7316b8e823f16…

MALICIOUS

PDF

84.6 KB Created: 2021-03-13 16:48:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a55849763969414a7c417781e202ab0c SHA-1: 5a45c4c83a8e74823433928db96f65fa38e7e73d SHA-256: ffe7316b8e823f16b678b6e9e443cdc1dd40702b0e844dc19c95414fce056d75
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://fokemale.ru/123?utm_term=angular+7+formgroup+checkbox PDF link annotation
    • http://suzofovolavuk.scienceontheweb.net/bissell_cleanview_helix_filters.pdfIn PDF document text
    • http://wojisub.mypressonline.com/the_blacker_the_berry_novel.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/weperedezazu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505102/normal_602f741c3f680.pdfIn PDF document text
    • http://zugapuvu.mywebcommunity.org/how_much_does_a_starter_cost_for_a_honda_civic.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377647/normal_60269d02ca092.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407813/normal_604641e06b8f4.pdfIn PDF document text
    • http://daselefufirapim.iblogger.org/fesuwufubokok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445555/normal_5ff29a716bbd0.pdfIn PDF document text
    • http://nogivubuleduwi.22web.org/mumakobevewivuno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452386/normal_60140c2668475.pdfIn PDF document text
    • http://napodosawukezob.getenjoyment.net/13294809087.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
    • https://uploads.strikinglycdn.com/files/9182ae85-0cfb-4548-9c06-96bb57518221/resistance_loop_band_workout_guide.pdfIn PDF document text
    • https://a5a7f18c-b887-48a0-80cc-3627c14345d5.filesusr.com/ugd/609f59_a37d1bf0de4f46cfb6eb92e7d6a68c3d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/27e739d0-6183-4ecc-90f6-023d3e58da05/24759685257.pdfIn PDF document text
    • http://zexitifi.rf.gd/xitidixoxajifenike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26cf4f1a-e8a7-4610-b44a-aabb63c22c38/why_cant_i_find_call_me_by_your_name_on_netflix.pdfIn PDF document text
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_ed00731770764b48839b26ad7da606dd.pdf?index=trueIn PDF document text
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_49483c32c07e4106ae7d5aaa623ebb8c.pdf?index=trueIn PDF document text
    • https://67536400-2f23-40e2-9d3a-36ae3f4dfb8c.filesusr.com/ugd/5312ea_2cc4385616b14d3d9160bcfe4c1d3d3d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f46acd8f-1b08-47ee-b0af-77a0be8f38db/pasololof.pdfIn PDF document text
    • https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_c2ae2e1bb1bd46c7951579126de35ac2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f64645ca-7e0f-4970-b6a2-17a8548952f1/how_to_setup_blue_iris_app.pdfIn PDF document text
    • https://fea67d75-dd3b-4bdd-af05-748e92ec8a52.filesusr.com/ugd/05900a_a6a305fbfaed487295f0616ed4c47c61.pdf?index=trueIn PDF document text
    • https://f33d1b56-f518-462b-b61f-c1b5c1ba661c.filesusr.com/ugd/1c44ce_631ed9ee0bb149708170a9d46df36c64.pdf?index=trueIn 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_off0000fdb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB3 5348 bytes
SHA-256: 2e4695d10608bc7948822bf89883c117b71388cfb6e2fbaeb4b0492d4f384d9f
font_01_sfnt_off00010fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBB 11276 bytes
SHA-256: 4b5c96fe84e422dfb6ab9755bbd95b5db9a542bdb097c817a85aaa343ff51e63
font_02_sfnt_off00013667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13667 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3