Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cbefd5fa98b4319…

MALICIOUS

PDF

86.9 KB Created: 2021-09-04 19:26:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 52f98f1c0b461bd07fe278860a89b725 SHA-1: a13f29312915ecc582aef90196466d2e96bf9a87 SHA-256: 2cbefd5fa98b431925f4e303401e06ebc5bdd1181421f5ffc988e95f6d550e0b
184 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs pointing to compromised WordPress uploads and disposable hosting, suggesting it functions as a link farm to distribute malware. The presence of a 'download button' lure and callback phishing pretext further supports a phishing or scam attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pixomot.ru/uplcv?utm_term=hec+ras+5.0.3+manual+espa%C3%B1ol PDF link annotation
    • http://xn--l3chcucnqd9c0eua7b1k.com/user_img/files/xuledategi.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16131fd36d6efc---31523890553.pdfIn PDF document text
    • http://xn--h49avwqct32ewe967crscpsaz7d.com/ckupload/files/21691862448.pdfIn PDF document text
    • http://cuacongtrinh.vn/upload/files/jonujajijeval.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/f17d1c7678c2e2830b437b954e58a852/41263275426.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/xatosogemenuluxukolek.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ad00713fd9e---lolumemuforuzi.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099c8c86029e---mixajonu.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/26440781417.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/35776097061.pdfIn PDF document text
    • https://makeswebsites.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/jofoliro.pdfIn PDF document text
    • http://mrcookie.tw/upload/editor/file/030256343525.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/a792rci5301vk2agm33d20acan/makokutorekunekunomuwo.pdfIn PDF document text
    • http://redskap.ru/userfiles/file/palivojexitezut.pdfIn PDF document text
    • http://misspacificus.com/clients/873634/File/59924449679.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610600bbb4ccb---12653940192.pdfIn PDF document text
    • https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/350a303891b7c8da5054ae5bfd8d6697/letebololuwogumonem.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/narezuxutexeboz.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/40931302650.pdfIn PDF document text
    • http://krakowska98.com/zdjecia/fck/file/vuvozida.pdfIn PDF document text
    • http://www.gpkoaee.ru/ckfinder/userfiles/files/53269133249.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab561d8c46---50577915263.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_off0000e996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE996 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A8 19324 bytes
SHA-256: 897b33d72a9f1a2580e557865982f1d3595209361089c63789f5ca82e07d1a52
font_02_sfnt_off000133a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133A5 11136 bytes
SHA-256: ecbb734f1f1c20546f2901ac69d6eb400f8b4aff4d7a99803d9e7e059c412e62

Open this report in the interactive analyzer, or submit your own file for analysis.