Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2780c0e3ded0a5e…

MALICIOUS

PDF

68.0 KB Created: 2021-09-26 15:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 983cb30bcf99d8ad8cadf76ac874ae10 SHA-1: 2e43b3323969cca712f86c4de34d7f7435edf37a SHA-256: e2780c0e3ded0a5e09f5fa5ee071f5803e8a1fb6dc03a977f3cce17bc87205ea
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common phishing lure, presenting itself as an image-only document to conceal clickable links. The embedded JavaScript and numerous external URIs, many pointing to compromised CMS uploads and disposable hosting, indicate an attempt to redirect users to malicious sites. The ClamAV detection and ML classifier strongly support its malicious nature, likely serving as a downloader or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://pretaporter-pegah.com/userfiles/file/66553281175.pdf In PDF document text
    • https://butchercurnow.com/img/shop/contents/demiwafapelare.pdfIn PDF document text
    • http://grafichesirio.com/userfiles/files/68818557128.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143afc508a07---jufufuzaderaduwe.pdfIn PDF document text
    • http://ceroki.com/image/files/89429003560.pdfIn PDF document text
    • http://eotp.info/sites/default/files/fck/file/48718050501.pdfIn PDF document text
    • http://express-service-auto.fr/ckeditor/ckfinder/userfiles/files/safopibuwori.pdfIn PDF document text
    • https://www.sexualaufklaerung-schule.ch/ck/ckfinder/userfiles/files/vumam.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/7fcd23d96d6773ce7ff4baf54fa79110/sukilukudonufar.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/161409dfcc84de---mutisibovisepemir.pdfIn PDF document text
    • https://parlagame.com/calisma2/files/uploads/tivalirukilup.pdfIn PDF document text
    • https://812423.qqtogeljackpot2.com/contents/files/movojosasulila.pdfIn PDF document text
    • https://mabuksusu.com/contents/files/banolikabopusuvevobudorix.pdfIn PDF document text
    • http://kgmda.com/upload/files/54615314599.pdfIn PDF document text
    • http://thewesternmist.com/userfiles/file/10756583516.pdfIn PDF document text
    • https://ysh.my/userfiles/file/vemapalipawebo.pdfIn PDF document text
    • http://pozitron-s.ru/userfiles/file/35628222178.pdfIn PDF document text
    • https://lanjutpt1.com/contents/files/4258713940.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/uq4tmu1jjoae3u5k19v457iilq/55241538540.pdfIn PDF document text
    • http://cardealer-space.com/js/upload/files/92787488555.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/2061378d1a099d388d2214cfe1ba738e/35454254765.pdfIn PDF document text
    • http://aallergy.friend-match.com/upload/files/nuvixi.pdfIn PDF document text
    • http://saluteebenesseresas.it/userfiles/files/51408055178.pdfIn PDF document text
    • http://icsbc.ru/fuploader/file/temenoxatawiko.pdfIn PDF document text
    • https://vidaleve.ind.br/ckfinder/userfiles/files/37653356900.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=types+of+flow+linesPDF 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_off0000b089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB089 14172 bytes
SHA-256: 0bd86983be82a68e19eecdde3af1a2bfba1975f27335005ddd69920073a4dbc8
font_01_sfnt_off0000d3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DF 10152 bytes
SHA-256: 469668fdf7f16f2a12cdb6e317c56181844f5d8b2ee98e8b9102e3870d02736c
font_02_sfnt_off0000eac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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