Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b08ae021b0641a…

MALICIOUS

PDF

79.6 KB Created: 2021-09-16 00:36:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-04
MD5: 7012cca52b0db5b8550580dbc77de0aa SHA-1: 0277266f86448ee4b7a23463ff479728df2cbec9 SHA-256: 64b08ae021b0641a13bcbc392547bd2a0bbcb8ad1aa6ca7b921b842b5a38944e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to host malicious content. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number, a common tactic in phishing and tech-support scams. Although no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score suggest malicious intent, likely to deliver a second-stage payload or facilitate a scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • 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://nomylo.ru/uplcv?utm_term=download+for+android+phones PDF link annotation
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/55745084594.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/55989049130.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/89850626423.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/ruzowurobup.pdfIn PDF document text
    • http://ainut.fi/userfiles/file/66283598200.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/ac65f6d70994436f43941a3ca2880e3d/xiluwexixipaxugufefan.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/furixebojuweviluzata.pdfIn PDF document text
    • http://twilaw.com/files/files/22574620257.pdfIn PDF document text
    • http://loscogliodifavignana.it/userfiles/files/54786473317.pdfIn PDF document text
    • http://miskolciharsona.hu/pictures/file/podujole.pdfIn PDF document text
    • http://rurisnet.org/images/file/98864729216.pdfIn PDF document text
    • https://smilaxlabs.com/userfiles/files/92655182534.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1612ebfbcd5734---38825032341.pdfIn PDF document text
    • https://premiersuli.hu/files/files/wisobisibubodujajilikigo.pdfIn PDF document text
    • https://www.borzabadi.com/ckfinder/userfiles/files/nuxajudiro.pdfIn PDF document text
    • http://anael.fr/fckeditor/userfiles/file/41108713634.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/wofuwiruduzizibimike.pdfIn PDF document text
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vapon.pdfIn PDF document text
    • http://ekvatorbl.com/userfiles/file/58738030774.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/wetawujuvifogakiwenanuso.pdfIn PDF document text
    • http://mrhobbscoffee.com/images/uploads/file/42764690182.pdfIn PDF document text
    • http://autovoda.ru/upload/files/77139387144.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/161326ad1108f2---mujurafigavi.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16139e560e1d52---78421873186.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_off0000d2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eaf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF2 10584 bytes
SHA-256: 7c6574d51cf46f01e2254047e3f01217ea01615b883146e8b4e2c082bae1f61f
font_02_sfnt_off00010308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10308 17604 bytes
SHA-256: b009f8c7e807b63c943f5982831452f3aef66b8d1f075b3037281137d215f850

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