Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1944239819b8a8f…

MALICIOUS

PDF

76.8 KB Created: 2021-03-18 01:39:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 168b38f484475bf839813c41172c29f0 SHA-1: e966d2759a0b0c79de8629c2bdecaa91ac91d5a4 SHA-256: b1944239819b8a8f545b96b0aa05d960c60259186b8d96ec976086881635cd60
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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://gimoguvi.ru/wix?keyword=lg+front+load+washer+manual+wm3270cw PDF link annotation
    • http://gadetebes.sportsontheweb.net/koduvedoramavituzimuz.pdfIn PDF document text
    • http://godezigupo.mywebcommunity.org/16955812643.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/nourish_how_to_heal_your_relationship_with_food_body_and_self.pdfIn PDF document text
    • http://levotavo.scienceontheweb.net/samsung_ah59_remote_reset.pdfIn PDF document text
    • http://pevewoxoxup.scienceontheweb.net/bepewola.pdfIn PDF document text
    • http://kogemotuju.getenjoyment.net/78246366038.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb276fe0-d135-4597-b6c6-d369e0b446f3/crossfit_workout_tops.pdfIn PDF document text
    • https://5e20aa6b-77ef-4f11-9344-5454fb7c649c.filesusr.com/ugd/fb3aa9_8e398d0790114d99a2d838e2cb7faa52.pdf?index=trueIn PDF document text
    • http://pewubik.atwebpages.com/xalul.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/kesidomubizidud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8ab05cd-b894-4493-8594-e0e27bc049cb/86445697912.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/kirixotirivelusuwivixox.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/broadcast_receiver_android_developer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90086d0f-5bb0-4631-8dc9-dd7d668d9587/plinio_glass_bead_game.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/80925995318.pdfIn PDF document text
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_db842ab49a844ad8b1496ea5712b10dd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/92cdc4af-7b79-4821-8df0-585f9bbeab10/5739143691.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/24820762227.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_off0000edc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC5 5984 bytes
SHA-256: 5106d78cab3a98f7fa248adf213d39f8bebf6405e42bf483323338e2103011b8
font_01_sfnt_off00010222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10222 10556 bytes
SHA-256: d83cf9807d8dd493bea86c2984b1816e3927a5e0e5063e7b684677bec503b775

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