Malicious PDF — malware analysis report

Static analysis result for SHA-256 b030276c242b7721…

MALICIOUS

PDF

85.3 KB Created: 2021-09-03 00:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cb266cdc5a38f3e5507c637253e43cd3 SHA-1: 957bf95633bad037ec8b67b70baf69225c850e20 SHA-256: b030276c242b7721938f798d5cf9b8cba164acd12be8db41df32a3e0555948a7
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. These links likely serve as a distribution mechanism for phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/aea3f4ad3678a2732cc7785d905c8e9a/12786249744.pdf In PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607976fdbb680---voxazivibagel.pdfIn PDF document text
    • https://arbormaster.net/uploads/files/mezukupewisotusiluperoxij.pdfIn PDF document text
    • http://stevis.cz/files/file/gekikidi.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/lixanifezidaraj.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1612b354d689b3---fonojizajusabu.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/6e6436f4f931725720590f39507f30a8/73236091615.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/28659781205.pdfIn PDF document text
    • https://digitaluzaktanegitim.com/calisma2/files/uploads/38145129823.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/99401764531.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1610a06695237d---xubajif.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/4383445ce1c8670629635d3c762b14f3/safeloxenoge.pdfIn PDF document text
    • http://khachsansapa.vn/webroot/img/files/7728623843.pdfIn PDF document text
    • https://wct.goldcrownresort.com/magazine_files/files/ziriserurubepeso.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d225c10761---69550658101.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/32085970885.pdfIn PDF document text
    • http://alwaysshine.com/fileimage/file/63696633190.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160744bd7218b9---72841754311.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/zujimarinituvelimu.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/910c8039e79a4fb0cb773fc40eed8269/kerifolepofasenuk.pdfIn PDF document text
    • http://haphadoor.com/upload/files/54510283779.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/ivg2qttj1eecds07renv3j46h0/tepugawejajegarex.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/74555502951.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=origen+de+la+celula+eucariota+pdfPDF 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_off0000e760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE760 10752 bytes
SHA-256: 11bfd9417053609e4349e117473cb642e571992ee42bccacf7bb89914418931c
font_01_sfnt_off00010007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10007 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11819 18560 bytes
SHA-256: d9f2ae0030c4f7af8e40e3337aa94e4240dd7735d2a4d9e5abfccda262a0908c

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