Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9001086f0a327bb…

MALICIOUS

PDF

90.8 KB Created: 2021-07-06 15:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: b5213be12e14d9276a0a5bde72cb67d5 SHA-1: 454a64d6e5b1885fbaaffcce6f29b473693bd752 SHA-256: b9001086f0a327bbbea11ff706d76ece3b8db3d9d122f5c6ee00ca5c1bcaaae0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, a common tactic in phishing and tech-support scams. While no scripts were directly extracted, the presence of numerous URLs, some pointing to compromised CMS upload storage, suggests a potential for further malicious activity or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/u6dj96pvs9hiu4gar3uq7lreod/76851918975.pdf In PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a77d80a342f---27756288831.pdfIn PDF document text
    • http://sicilalluminio.it/userfiles/files/10708880706.pdfIn PDF document text
    • http://artgraf24.pl/userfiles/file/xijokedusu.pdfIn PDF document text
    • https://aokman-drive.com/d/files/23345682870.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/39271883201.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b18c356968---sixewexalevupegipinimenux.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9e749d2133---68963011026.pdfIn PDF document text
    • http://feg.vn/uploads/files/84997915866.pdfIn PDF document text
    • http://allg-gyn.ch/userfiles/file/27509924781.pdfIn PDF document text
    • https://lemanssrl.it/file/dopereposeduwilosusilejob.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c61835392---29013048581.pdfIn PDF document text
    • http://absigorta.come/file/47386513705.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210605132254.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/pokesusuji.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/niviwubuw.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/6620890139.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45b60cba41---84256704352.pdfIn PDF document text
    • https://hiroyoung.com/data/files/wujazuredaluvibon.pdfIn PDF document text
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/28500878276.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/e078bf26e4b76826ecb1c9b6d93db1e9/86133107079.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609837f10f49b---26841239441.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=application+of+pde+in+real+lifePDF link annotation
    • https://lapdonline.org/file/917941072.pdfIn PDF document text
    • http://pro.ovh.net/~tribuene/images/banque/file/jidozewubadarewar.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_off0000fd7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7E 10424 bytes
SHA-256: cc64d65ca4e561fd5a3c46cda4d418799998e6e2d616dc24948c3d7b1478ede7
font_01_sfnt_off00011542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11542 18300 bytes
SHA-256: 7e008efa36539f46e70e92debad381d6eb956b497d89a0f911bd198203d8cc0f
font_02_sfnt_off000145d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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