Malicious PDF — malware analysis report

Static analysis result for SHA-256 27acc58384dec30f…

MALICIOUS

PDF

69.7 KB Created: 2021-10-02 13:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: f8170e12752a244da6c397efead1b8a1 SHA-1: b17c9c6052061621e9064b214984499353553b59 SHA-256: 27acc58384dec30f5cf2d7ff3b7854cb9df30a6691dd144031455dd29824d79e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The heuristic 'PDF_IMAGE_LURE' indicates it's an image-only document designed to trick users into clicking an embedded link. Multiple URLs point to compromised CMS uploads and disposable hosting, suggesting a link farm used to redirect victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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 69 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://mosallaesf.ir/uploads/ck/files/82790642849.pdf In PDF document text
    • http://madmojo.com/fckupload/file/javutotibofe.pdfIn PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/retigosogedodi.pdfIn PDF document text
    • http://aedelsur.com/contenido/files/13708044168.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148389e82604---88092189185.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16150983f34c31---vifunijavegurubegar.pdfIn PDF document text
    • http://studioferrato.it/userfiles/files/menojat.pdfIn PDF document text
    • https://ruh-center.ru/userfiles/file/kumuliwalilalixalovek.pdfIn PDF document text
    • http://aumnat2car.com/ckfinder/core/connector/php/upload/files/13618634455.pdfIn PDF document text
    • https://citronixdeflection.com/nbloom/fckuploads/file/gosazasaferefofoxaz.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/551533ee1b60a64941f6aa133365631b/suxobolapede.pdfIn PDF document text
    • https://visualmotion.nl/uploads/file/dejuvib.pdfIn PDF document text
    • http://abwrva.com/uploads/files/nomowote.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/b1tt9ofld6dntplmeu511fut5r/16237071606.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/161307ecb8cdc3---2697401907.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/vasotoxiranoxirovoxamowol.pdfIn PDF document text
    • http://antasboru.com/guvennet/resimlerfiles/fetajetukowosatumibip.pdfIn PDF document text
    • https://careersourceokaloosawalton.com/files/public/12920196630.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/478637d43572a7e5597af42fc28cc4ae/16888643684.pdfIn PDF document text
    • https://terracetemayonetim.com/upload/ckfinder/files/ferige.pdfIn PDF document text
    • http://www.oiseaubleu-promo.fr/userfiles/file/25401839153.pdfIn PDF document text
    • http://kapsalonindex.nl/images/uploads/72516149736.pdfIn PDF document text
    • https://ckeditor.pamlskovnik.cz/ckfinder/userfiles/files/fakumiziroga.pdfIn PDF document text
    • http://st-johnson.com/Uploadfiles/files/95147980092.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/56856574284.pdfIn PDF document text
    • http://www.physedu.in/newsite/userfiles/files/37593740659.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=human+body+inner+parts+imagesPDF 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_off0000b48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB48E 14028 bytes
SHA-256: dd5d6b8d5c0394de0a994dc57a9ec81c7a2fa75c2e7426e8fd3e5eae95999721
font_01_sfnt_off0000d763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD763 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ef7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7A 11036 bytes
SHA-256: 08711508e23bb81ab38a74c11d518329a3e4f9add9411aba1663c0b70f54fbf8