Malicious PDF — malware analysis report

Static analysis result for SHA-256 f43d0716efee42d5…

MALICIOUS

PDF

68.9 KB Created: 2021-09-26 10:38:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 58c9c965ce8bf30439ac89afd31302a8 SHA-1: 1705f2d778f8820751fbd7e6469f73ecd14cf62c SHA-256: f43d0716efee42d5cb0294d6274645e2e2bc7518e73597404056db28d6769c50
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains numerous external links, many pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The PDF_IMAGE_LURE heuristic indicates it likely presents a full-page screenshot to obscure a clickable element, a common tactic for driving users to attacker-controlled URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://elpollopaulino.com/cenavarra_userfiles/files/80404557918.pdf In PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/tojojuxexifuzanoweku.pdfIn PDF document text
    • http://imhome-listings.com/userfiles/files/67461051850.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/8876605215.pdfIn PDF document text
    • http://letnipohar.cz/upload/file/jurivaduzig.pdfIn PDF document text
    • https://butchercurnow.com/img/shop/contents/suzur.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/079lhvbn80m4ue6f6e6dribqem/zaxisiw.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/98351793356.pdfIn PDF document text
    • https://marwaservicecenter.com/nbloom/fckuploads/file/64242652998.pdfIn PDF document text
    • https://pnvvr.ro/userfiles/file/pivogupuxijaseki.pdfIn PDF document text
    • http://arucax.am/user_images/file/kumununivazorob.pdfIn PDF document text
    • http://newgoodluckcrane.com/admin/uploadfiles/file/zuzaluvoferones.pdfIn PDF document text
    • https://galerie-louise.be/userfiles/files/zivasadosoxemidusiguvu.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136922861087---45026613928.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ef021144b8---bibesoniten.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141902e0e369---49599888350.pdfIn PDF document text
    • http://htwy.com/upload/file/semoruwotafebato.pdfIn PDF document text
    • https://ochronaskory.pl/pliki_user/File/fubawupane.pdfIn PDF document text
    • http://aotwcasino.com/ckfinder/userfiles/files/13051540551.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/5dc0cd80e8685ba468f0ffc0e96ea554/momenasefoketebunife.pdfIn PDF document text
    • https://franchisefarm.franchiseharbor.com/files/files/8548832005.pdfIn PDF document text
    • https://phnews.ro/files/file/39928914338.pdfIn PDF document text
    • http://tko.wavedev.net/img/files/files/8817499080.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/xevagerojulabajo.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149812feceaf---kidada.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=temple+run+2+download+for+androidPDF 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_off0000b1ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9BF 14360 bytes
SHA-256: a8748acad4be4e76cc333e4f6cc64ac30a3efd29ce3a1223eabc42e7ab41612d
font_02_sfnt_off0000edba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBA 10660 bytes
SHA-256: f4b0272cb83bd74de87f11d536313eae3e69dafae5f8d1a529216059028dee61