Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e07d72f770a84a0…

MALICIOUS

PDF

95.9 KB Created: 2021-07-28 00:13:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f6fb0adddf245e13f8ac81a12777fde8 SHA-1: a8dedf2b62c3bdda5f5250f463518416c5d9f79f SHA-256: 1e07d72f770a84a0a6e28e75d81f60c83bc1d2ea29ac9a431641f2094bd80257
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many pointing to domains associated with compromised CMS uploads or disposable hosting, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body is heavily obfuscated and does not provide clear textual lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/160980e33c320f---gizuwuwut.pdf In PDF document text
    • https://debcopharma.com/userfiles/file/lametopuwinubar.pdfIn PDF document text
    • http://camping-du-lac-dijon.com/fichiers/38389432860.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/67137802513.pdfIn PDF document text
    • https://henklinders.nl/henklinders/upload/files/3473522678.pdfIn PDF document text
    • http://patriabrno.cz/userfiles/files/80460964458.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/alihcibh1v05cibqt4jd7dj7u0/kavuwuwevixuxuf.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/c5ue04c4v2581ohdsvqev02lfc/wiredemifomidufin.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/d91c37616d92a501ca71de2201bbe648/56171463266.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/96419868151.pdfIn PDF document text
    • https://vaitinhdien.com/app/webroot/upload/files/32893572234.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d45c9366c---22555835451.pdfIn PDF document text
    • http://dental-forum.ru/userfiles/file/naruvevuxeniwirugigewog.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/56671082725.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/d7ca7d8162db1b54ef33b85cd8aa0812/65472799314.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/2479147e9c830f7d5634098f2e67df40/xijonaxopi.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202106280124542164.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/32155705338.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160858f409a786---naxinogunenuvufara.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/fogudopedalewomanul.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/7cb30b539100b7db5da2b14bc9b0402d/2997446620.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/jvpom40u0p8cc8hddfunki9303/15686465182.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=water+supply+and+sanitary+engineering+by+gs+birdie+pdf+free+downloadPDF 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_off0001124a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124A 11108 bytes
SHA-256: c2b32a0312b05c852520dff13a800fc55722ac8f55929f4ffa5c6c83a209aef3
font_01_sfnt_off00012bee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BEE 17248 bytes
SHA-256: b4afa379d124635f225a7a3af27435e14288b0da8ebe62b50a1dfa02e549e222
font_02_sfnt_off000158b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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