Malicious PDF — malware analysis report

Static analysis result for SHA-256 eabbde896a8bfd12…

MALICIOUS

PDF

82.2 KB Created: 2021-09-17 01:47:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 96c9fda50ce9aab498caf1a85596efc3 SHA-1: 948ea9aecdfc2d77b23e2fa4ce658d7b81a2bd7b SHA-256: eabbde896a8bfd12968293060b16d621ac70f9455ebd8435f535a062073df4c5
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to compromised WordPress uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The 'SE_CALLBACK_LURE' heuristic further suggests a phishing or scam pretext. No scripts were extracted, but the presence of numerous external links implies a redirection mechanism to a second-stage payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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) 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=c%2B%2B+guide+pdf PDF link annotation
    • http://rutka.pl/media/upload/files/99f15fa0491a855ba409f4cd5c1e4312.pdfIn PDF document text
    • https://pollackmihalyiskola.hu/ckfinder/userfiles/files/bikiz.pdfIn PDF document text
    • http://verzorgingsindex.nl/images/uploads/18772849196.pdfIn PDF document text
    • http://gyarmatilovastorna.hu/userfiles/file/sirugujorugatorozugotini.pdfIn PDF document text
    • http://sensi-leszno.pl/userfiles/file/23455174465.pdfIn PDF document text
    • https://www.serwkom.pl/plugins/ckfinder/userfiles/files/lavolisebele.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/ronadasaxebesefowik.pdfIn PDF document text
    • https://bompentax.com/quangbasanpham/app/webroot/upload/image/files/63878850619.pdfIn PDF document text
    • https://nissanzorba.ro/ckeditor/ckfinder/userfiles/files/55222295350.pdfIn PDF document text
    • http://www.agot.pl/upload/file/45300194607.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/jifojakofamupuzof.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/hnv3poi4v4siphml00cd1avfvh/gefovitemukofoxonanuruwe.pdfIn PDF document text
    • http://lulanjina.net/upload/files/39202554183.pdfIn PDF document text
    • http://onmamtour.com/FileData/ckfinder/files/20210901_26788BDB25405624.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/sidazixosezag.pdfIn PDF document text
    • http://streetnn.ru/data/upload/ck/files/85713970763.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/mebul.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c6de3a1208---fegujodafabekorizelox.pdfIn PDF document text
    • http://www.pilatesyoga.hr/files/files/pumeduriwijafom.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/80136994858.pdfIn PDF document text
    • http://silverk.ru/img/lib/file/41011450286.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/5ss7a3ourpteevpme6nnlkj1d7/31002428739.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16140330a2a6d9---tokeziwerisado.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_off0000ddb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB2 18592 bytes
SHA-256: d700ff81462f942d8e35f51eced2fe24cb7b586a760f337d05335db577607722
font_01_sfnt_off00010d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12599 10008 bytes
SHA-256: 2a429d7c42820ff024ea0241c93a67e4635a9fdf7e174d8a947eaa8c09513f61

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