Malicious PDF — malware analysis report

Static analysis result for SHA-256 f751e024fbbc6dbb…

MALICIOUS

PDF

85.4 KB Created: 2021-07-17 10:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 56ac31172cc547cf092fb650e5571fa0 SHA-1: 3334b7514c66d96649f0e1f1e50253a8f14323c1 SHA-256: f751e024fbbc6dbbe352d03ddcbb47ac16fdc88b8030c437d37c70e994769d61
216 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ClamAV and a machine learning classifier, exhibiting characteristics of an advance-fee scam. It contains lures related to lottery winnings or prizes and instructs the user to contact a phone number, typical of callback phishing or tech-support scams. The document also functions as a link farm, pointing to multiple compromised WordPress upload directories, suggesting a distribution mechanism for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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 http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5ac527b968---13098936673.pdf In PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fea58b2f89.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/sekibikikotu.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b741294d9f---lerejekedawagudesoxakolok.pdfIn PDF document text
    • https://digireg.es/upload/10192750892.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1607852f84f92f---67578684040.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/bf91adbf7787e3607e01d317bfb1a513/82200971207.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082155db61d6---14636254166.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/sobesivu.pdfIn PDF document text
    • http://englishkan.net/UserFiles/File/52910162.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/6acdabbdfa151d2bac09fed7fee4d28f/xuvizozitonifu.pdfIn PDF document text
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/53477750804.pdfIn PDF document text
    • http://pneusmarene.it/images/file/59673184938.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/zabupananililodon.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/7762e490feec14d99db3782ba27ba290/52852749933.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/dadajapij.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/87643120054.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/71939077325.pdfIn PDF document text
    • http://fygl.net/uploads/file/132058495716.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/498ssnthskuldl9pce5q7evle1/26378910476.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/3659adeaaa2c7af18f8adfd6ce58ac0e/domumagazijatibubilalid.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d2bb36ef8---benuvotaxiwejadused.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/g7jrph8hfsc7u5k9bcbgokpd6k/24244599472.pdfIn PDF document text
    • http://metaglas.kr/userData/board/file/23298770747.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=get+my+cat+fixed+for+cheap+near+mePDF link annotation
    • 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_off0000e8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CB 16952 bytes
SHA-256: 3f19e88300e712c9ae3fdb44d01fef242ad5e9dc9acc14bd3f86829fd02cf44e
font_01_sfnt_off00011544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11544 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D5B 10928 bytes
SHA-256: a4617bcc22dabf2a3ade37056a2c63e8fc7eed46fa36154cee79d29069c78d7a

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