Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9d93176b02d5831…

MALICIOUS

PDF

89.3 KB Created: 2021-06-30 10:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 4e8bd0c58abb6cf739ef2f700490fe7e SHA-1: c29ad6b0897a93cf6df85d8fb1e5254bad093f22 SHA-256: b9d93176b02d58316d999c89071cd8f9cf301031eb3bb6fb182e60b5634e7558
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that exhibits characteristics of a callback phishing or tech-support scam. It contains numerous external URLs, many pointing to compromised WordPress sites, and one specifically targets 'federal bank customer care'. The heuristic 'SE_CALLBACK_LURE' strongly suggests the document's intent is to prompt the user to call a phone number for fraudulent purposes. While no scripts were extracted, the overall structure and URL patterns indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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) or Microsoft license-boilerplate 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://queure.ru/uplcv?utm_term=federal+bank+customer+care PDF link annotation
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/352c59cfd69bddfa047b0bf33c5b1466/48685433785.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/valonebanub.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/83929541822.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/n3djm4ujujmfmgi0e6703l9cga/24331775798.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/8430fac4a6b546513321684f35c2e7d2/37585155432.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/5ae5d13c9961458ba671314ea435be76/49048514836.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/92610310166.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076692aeb959---41797497578.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16074a3f1245ec---95670883526.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/920a0912a3bf8801a8c76bbe7da41c11/51167943956.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6dcebc4c12559c5470d53b31288252f0/55148108153.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840e1b45622---34303528505.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d6fb36ca9---94634552818.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/cf321687de7fec07fe0e881dd27440f1/vupasukavixotifarowe.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/05vh2vmljjr0q85glhkh1b0n98/dewosadekiruxaba.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160965dde1fe72---19374968040.pdfIn PDF document text
    • http://winso.tw/userfiles/file/37695820862.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfcd8f98097---fomotu.pdfIn PDF document text
    • http://termocity.by/pics/files/10401069682.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/rimuzevudakuxavudobufo.pdfIn PDF document text
    • https://arket.io/wp-content/plugins/super-forms/uploads/php/files/h9cko5fs8pipjuiku0a39pagc1/45318717575.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/cdf16297139a89525ffd5c13123c8f6d/78167885936.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/sagupanulakuki.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11020 17252 bytes
SHA-256: 54ec80a0aaa96a9cf0f047035b69f86a2af6d3bf4422b87a1a7ff3f07c8dbbe9
font_02_sfnt_off00013d9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D9B 10748 bytes
SHA-256: 0bc5a8c462c97d7f4776c4d991feefe42b1b05e2d4e0c20148b529d7546cd375

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