Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c19ae58971f22dc…

MALICIOUS

PDF

86.2 KB Created: 2021-06-28 13:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 2087422f47facd2c95c45a30713fdd59 SHA-1: 72f3fe508913d3380b8be699ab9ebd2dd79deb4d SHA-256: 9c19ae58971f22dc84f69aa27660e82c461ae1c3f839cc042f052ea9e743e44a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://krisoc.ru/uplcv?utm_term=andy+stanley+new+rules+for+love+sex+and+dating PDF link annotation
    • http://cherryontop.pl/upload/fotki/file/29137071940.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/a0dcb45069774844a4a0b2778bdb2dbf/84852439324.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/07fc41d454ce74a4e9560144368e6835/19257997329.pdfIn PDF document text
    • http://v-lukomorie.com/uploader/files/begelo.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021052000181373499.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cf61d8d9816---51884520651.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/pm7039lmqnga5lrrkb89th0dj7/kipufobor.pdfIn PDF document text
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/47405844829.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bba338ea80e---nogadejuletovuwerakoguv.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/f05bf4aa03e7a25abccc7d5decd54ceb/12841873706.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/99927449125.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d31687df4---33361856829.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f93534c26f---rarudelukakor.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160cf2c580ac3d---divegepe.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/fujok.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/58316151893.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/lp86e54i67r7clkihf70h6po7u/gebejesulafoxeduboze.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/mokilarivezokefifaxusoro.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5f70352b9---4982838799.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/98618675315.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/dovododasipom.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/siwegosokomeg.pdfIn PDF document text
    • http://mooneyes.pl/userfiles/file/vodigobiji.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_off0000ee71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE71 10980 bytes
SHA-256: 294f93e919704005a70725d530f46f05550c2f34ba931ead7213e1260525f98a
font_01_sfnt_off000107fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001200f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1200F 16756 bytes
SHA-256: 0d180af2c20d21eb1c57747af2806099b237d6f6aac9f517fed6ea8da40d005b

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