Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b14534453e33264…

MALICIOUS

PDF

95.1 KB Created: 2021-07-03 01:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b215a4aea04b4127a7d98b18c2f3ce18 SHA-1: 2fb45cc38e61a6f42e0b9ea8c57b14c980621bdd SHA-256: 9b14534453e33264b09b28dd054143a164ee5b45c175e12c4d6a6ed0fa6e11cd
236 Risk Score

Malware Insights

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

This PDF document contains numerous links to external resources, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to distribute malware. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document likely instructs the user to copy and paste content into a command-line interface, a common tactic for executing downloaded payloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading and executing a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://irlanc.ru/uplcv?utm_term=download+need+for+speed+most+wanted+exe PDF link annotation
    • http://kochamsushi.pl/UserFiles/file/19361224240.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b866444ed---sogopaxebuzaniroruw.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/bibedepedeva.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/ohhpkp2t3k4qk6lg3n8hkoigkb/zupobaganatuw.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/vatabulevubeboraxexaxe.pdfIn PDF document text
    • http://topas.lt/userfiles/file/gimanezewuxodizupunevoto.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a080a2c74d1---90682362019.pdfIn PDF document text
    • https://cavalier-hundezucht.ch/userfiles/file/xujiritagalagaweba.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/3980528514.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/db61abdf9e62f04fd6d4ab048de28c4e/74658287174.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/psfs8np3qruhmf4b5uu4slddv7/73297348257.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a6931429bde---63763300585.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/romikixaferuximosem.pdfIn PDF document text
    • http://0965818789.com/CKEdit/upload/files/77432437064.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/a7c66ccb78f8694ed4fba4aa7c16e541/93747196954.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/94816568074.pdfIn PDF document text
    • http://ambulatorioveterinariobubiniregini.eu/userfiles/files/78244297038.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/lubexafubukuriwixuxakobi.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16078de90d3900---laxexevovokatun.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/nubaforikomuronazax.pdfIn PDF document text
    • https://nepalimodelagency.com/userfiles/file/najupelesomo.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160758752c77ed---96415766817.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA10 16252 bytes
SHA-256: d66bf48e304c78f6080084e0c9704384de85738853ce87f784528b0e0784b990
font_01_sfnt_off00010ffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFB 10756 bytes
SHA-256: 6d3792c951217887082eca9851ac3b76cf3ca4b82ba2bb762ab4a17e08489837
font_02_sfnt_off000128c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C9 17496 bytes
SHA-256: 9e74f27952e8f5c3eedb6a83e443f8b18dcae684e69eb789dd11a6889f2473e2
font_03_sfnt_off000156b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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