Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee4488c9fc9cb1a2…

MALICIOUS

PDF

74.5 KB Created: 2021-09-06 15:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4ad0aac717c017cc30dc0c1f657e0fa4 SHA-1: 3433f7f7a0b20953d3be061610e3a1b9bbb76822 SHA-256: ee4488c9fc9cb1a2c24ca17da94623d344e2b3ceb625dd5487d0c01b0d1f516c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely serves as a phishing or malware distribution lure. The presence of numerous links to compromised CMS uploads and disposable hosting suggests a link farm designed to redirect users to malicious content. No scripts were extracted, but the overall structure points to a phishing or exploit delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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 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://pacpartner.net/images_client/imagesfile/luwutepowig.pdf In PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/naxifetopubotidik.pdfIn PDF document text
    • https://atkarisuli.hu/userfiles/file/91588373726.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af535deec69---95445643042.pdfIn PDF document text
    • http://ppfi-online.com/userfiles/file/jivufixogilavoxa.pdfIn PDF document text
    • https://fleschimmo.lu/userfiles/files/berukugoban.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/31676506841d78e00b8626ef18a17326/47063779354.pdfIn PDF document text
    • https://panama4d.com/contents//files/39286138012.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/8041770631.pdfIn PDF document text
    • http://soupworld.de/upload/file/belomibiriligokozosesujek.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/4ef53843ac781f5e76ec3b2cbefd2511/80294782205.pdfIn PDF document text
    • http://northwestpixie-bobs.com/clients/e/e1/e1941a3904c49320334fd90e0ed9e852/File/betemifozunax.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/tiwifozenowelitutadu.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/82591196266.pdfIn PDF document text
    • http://aptekainternetowa.net/_mdm_apteki/file/83179853045.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6d3754ca9b---21467081133.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/3ud8u66251b82jvj9l4jb1pd52/vufamepupetiviziki.pdfIn PDF document text
    • http://fotossc.pl/_files/file/78887151913.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/4485165073.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611e4d541a539---17762620818.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d7fa5af53---3775605371.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f0d640104---zuvovi.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/p43cekouuuu3io4dqqv9io0tnn/59290184702.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=toastmaster+hand+blender+manualPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC246 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA58 16636 bytes
SHA-256: dc5105fcde63b4256461d61979e012a6d5377b246b604b321a57fb3e4bb260fb
font_02_sfnt_off000104b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B7 10624 bytes
SHA-256: c8248c49b28c5128563043d525ed61586e305bea58d6fa0469d707dee1fc782b

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