Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb7dcbe412080091…

MALICIOUS

PDF

87.3 KB Created: 2021-07-31 08:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e377c5cc767890f8652887d39d51ee31 SHA-1: b1746ddf79fedcec9efea9f10aa167ed48e5ac92 SHA-256: eb7dcbe412080091a1a43cda901e76fe1c043cac7d6f70b6a1eaef191d92cd17
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure suggests it's designed to lure users into clicking links that lead to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160983fc6ee64b---7684978182.pdf In PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/jibalolubumubev.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/2e945ed1fefe655794ad505aaeca54c5/73749689995.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf427b64084---66255466766.pdfIn PDF document text
    • http://www.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/7289841746.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/6d1c70f999145527246320a16c2118a6/zetem.pdfIn PDF document text
    • http://smart-ventures.ch/upload/Editor_Images/files/92850539429.pdfIn PDF document text
    • https://sofupingame.com/calisma2/files/uploads/kisejebajugub.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b25cd5d39bf---80766841676.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928b140accf---vopupokiko.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160970a17ea857---tepobefarufizorigasusiwed.pdfIn PDF document text
    • http://minhvuongthuphap.com/upload/ck/files/47994774853.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160859085d98da---kiresozis.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/b63fd087f1bc11276d3af7f66b50f280/38615541271.pdfIn PDF document text
    • http://robotsuk.com/luckingbros.co.uk/userfiles/files/xofewibizuwubixok.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b779157cc62---19732566450.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609215fae9c69---gititerekotemapeworazuvaw.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/4897edf703846cd6663bd7cbab6b4e73/goxuvuxogulawase.pdfIn PDF document text
    • https://shopexpert.com/app/webroot/files/userfiles/files/bomibidira.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/dnpa7dlt6g0kkhnan2thia190v/waberaga.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/71861208123.pdfIn PDF document text
    • http://nessium.net/userfiles/file/fofanurasetamul.pdfIn PDF document text
    • http://www.tsahimmongol.com/uploads/images/files/kidinuxilijewewewimizol.pdfIn PDF document text
    • http://winterwonderlandzundert.nl/uploadimages/files/votonul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=maybe+interactive+stories+mod+apk+sbennyPDF 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_off0000f09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09D 16560 bytes
SHA-256: 534d58b52d5f9731c87934b65d4ab9d7475d22f15416652eb494b622082a9fc0
font_01_sfnt_off00011b9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133B2 11032 bytes
SHA-256: 6bb9e38df8b43e582448bf3e58f92c476b7226ae3299cf424f2913ff126306a0