Malicious PDF — malware analysis report

Static analysis result for SHA-256 7936d1eac69b5a1b…

MALICIOUS

PDF

81.3 KB Created: 2021-09-04 07:27:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0d2cc2258a6e434d6d3b52ef17f37a0b SHA-1: 1288dc9e6153bc93de97faed91b713a34b0f71c3 SHA-256: 7936d1eac69b5a1b43a67b58f57e131cd4b044e8899609b79eb18267f93e24bd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, containing numerous embedded URLs that point to various websites, many of which are hosted on compromised WordPress installations or disposable domains. The presence of these links suggests an intent to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://philabc.ru/uplcv?utm_term=signore+ascolta+puccini+pdf PDF link annotation
    • https://aronabritcan.com/userfiles/file/redejojaw.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/suzazurejuvanitogikotis.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/ledaxosizofaxewamilos.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/58533409646.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/e6q130dcc34344f88ka57ibru9/meralumozej.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160796ae2b56f5---38753042453.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086a61f5f8ba---nolozukapetepa.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/6694782575.pdfIn PDF document text
    • http://1959blackshirts.com/clients/866684/File/2468640411.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aec3650b0ac---bumadiwaxugojunek.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a90a0470208---49424626359.pdfIn PDF document text
    • http://noithatmfc.com/media/ftp/file/56544842103.pdfIn PDF document text
    • http://akvatoria.by/UserFiles/files/96298029395.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210709070614923.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/944788bca6bda2732322b3b3bb96f999/66812904258.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c23715e166c---jilupujuwuvapefi.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/71838966038.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/85174155679.pdfIn PDF document text
    • https://jagamimpi.com/contents//files/22790744306.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081088f0d8e2---voxufaguviweribelanavoziw.pdfIn PDF document text
    • https://suksesunited.com/contents//files/11123234882.pdfIn PDF document text
    • http://vtdsbinhthuan.vn/public/uploads/userfiles/file/bogaz.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/84855566915.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/bb8aa1b26cc6806b9d607508db1f3ceb/rimululopoxofu.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/nixani.pdfIn PDF document text
    • 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_off0000d678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD678 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8F 10972 bytes
SHA-256: 9da1d768d65798a93341ca358779eadc990e83d21224a97e6c99155703d0bfd6
font_02_sfnt_off000107e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E9 17976 bytes
SHA-256: a27df13d611a48625fd1046783569458e39c25890a8f9669a4a08abd7249530a

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