PDF malware analysis — malicious · 859a673e9b5413d7

MALICIOUS

PDF

77.1 KB Created: 2021-07-04 10:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: dff008c1cbaf881424ce11130dbf8f28 SHA-1: f2b0778a6e150aa476fb93c87d4c6932a6080098 SHA-256: 859a673e9b5413d7d3b75588d64b86b4f5a182ce60bdeec24ad3e4f4e4ee79fb

176 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document exhibits characteristics of a callback phishing scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. It contains numerous links to potentially compromised websites, suggesting an attempt to host malicious content or redirect users. The ML classifier and ClamAV detection further support its malicious nature, likely serving as a lure to initiate fraudulent interactions.

Machine Learning

Nyx PDF Classifier malicious score 0.9840

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://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/6t9fa9362g2cut8cqoas6s4565/30022201151.pdf In PDF document text
- http://gidaero.com/upload/fckeditor/file/wepomopezatogibukasa.pdfIn PDF document text
- https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/kn9jqspu2mcmpeoqna6jghq0e7/temazaralereditinuzafu.pdfIn PDF document text
- https://flardochform.se/userfiles/file/bupefadudofonawa.pdfIn PDF document text
- http://work4shop.cz/userfiles/file/40974500016.pdfIn PDF document text
- http://ahdongjiu.com/upload_fck/file/2021-5-6/20210506073811431420.pdfIn PDF document text
- http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d736acbe5f---salezinit.pdfIn PDF document text
- https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/js76hverql8pnfuuqhfhaeg7c3/61347774713.pdfIn PDF document text
- https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/43f58c139302b827996d76d3347b3b72/26533853084.pdfIn PDF document text
- https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f0005f594---32115328137.pdfIn PDF document text
- http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/1tr37pqa1l6blrmp194h44l306/lesafolujasojo.pdfIn PDF document text
- https://aljazeerahpetroleum.ae/userfiles/files/51788863141.pdfIn PDF document text
- http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f62150b20d---dodisefifuviviloxonopifu.pdfIn PDF document text
- http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609d14622738f---52295771387.pdfIn PDF document text
- https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/9ffeaf483d8f36ef805db45008a827a1/lufipewonovu.pdfIn PDF document text
- http://saovietgroup.com/upload/FCK/file/nipoxadibubidaxovuzalotu.pdfIn PDF document text
- http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6f09059c2---87075878998.pdfIn PDF document text
- http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b29a8ec5b09---36667825277.pdfIn PDF document text
- http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d433cd8ea---59730283981.pdfIn PDF document text
- https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/5520b27617b018a5058897b4cfa9eadf/80494031731.pdfIn PDF document text
- http://johncarroll1967.com/clients/1/18/1896e795ecc2602204d707ec4e69586f/File/80787668288.pdfIn PDF document text
- https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/3hurkj7r5l9l9sf5sdb47mofe5/45827986946.pdfIn PDF document text
- https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160889c295e5ab---solofoporuvubu.pdfIn PDF document text
- https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d81be763ca5---rikagasutonezixudide.pdfIn PDF document text
- http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c3856f09fcc---fuvomodunebusumutoxusox.pdfIn PDF document text
- http://www.celso.org/download/pawatenasepijivira.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=3+quarts+is+equal+to+how+many+gallonsPDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cb69.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB69	16216 bytes
SHA-256: `51e4bc6e4d979d5d4764cf109924dfd8477f048ef882d33120835b834b2933df`
`font_01_sfnt_off0000f566.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF566	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010d7d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D7D	11076 bytes
SHA-256: `715026f3b842bdf1800ecc5cb1a0c47babf13bf35a4cc533552ef5368b4e561e`

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