Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbf296da9828fbce…

MALICIOUS

PDF

85.3 KB Created: 2021-08-14 00:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 68bc50b49c32d98ba72c44dc64aad38e SHA-1: 4d16e1ac3d3bab360c2c1b76b870d0298be0516d SHA-256: fbf296da9828fbce2b3002483b4c3fb7e86896bf12445925d42610c6d626a9d1
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'SE_CALLBACK_LURE' indicates the document's content is designed to trick users into calling a phone number, a common tactic in callback phishing and tech support scams. While no scripts were directly extracted, the presence of numerous links to potentially compromised or disposable hosting sites suggests a broader campaign to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://labonscafe.com/userfiles/25461351928.pdf In PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210628193356.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/gelaxevirajodorojok.pdfIn PDF document text
    • http://apcmagon.com/userfiles/fewelisovurugumatuxoxin.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16095f7dce3408---60004665069.pdfIn PDF document text
    • http://stringpoets.com/userfiles/file/92101683787.pdfIn PDF document text
    • https://bacninhonline.com/webroot/img/files/vivugusev.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/lsmn2sngib0tqhnonfvpomhm1f/31776144052.pdfIn PDF document text
    • http://allycatering.com/userfiles/lejobur.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/19683253f7c1ef02513c07f3f10be286/85340854739.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/bb90f8c845902f596a08c264c3a3a5f9/80140846358.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/femofubemubonod.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/86994052123.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/63097941305.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/da8c20549899284e1ea4190d8f86ee29/73477671551.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/dotuseziwawogazekuxuku.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4dd18d0c29---54610866091.pdfIn PDF document text
    • http://alexandraharris.com/clients/36054/File/59669269872.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/11a6b276c15b50246611cab61397e996/25038053531.pdfIn PDF document text
    • http://rosniyom.com/userfiles/files/652788008.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/62517360655.pdfIn PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/nazonogozikafisubonereze.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/203351429b7c08668b45278755dd8343/fuvevun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+check+if+a+postal+money+order+is+realPDF 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_off0000e986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE986 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10198 16668 bytes
SHA-256: 20b66bab95129018b289d0977836ef13d8feca0cf7379990201d214c4eb16aac
font_02_sfnt_off00012cde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CDE 11168 bytes
SHA-256: 1290423d0360bdd6bcd80c610f295942deea410ce7f705106726592a9e707dde

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