PDF malware analysis — malicious · 15374fe0548d8494

MALICIOUS

PDF

87.8 KB Created: 2021-07-02 15:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: c214118c5c750b3addb265e154af4d8b SHA-1: 0d08d6f804dca268672cf6c872874d9ff1c671e5 SHA-256: 15374fe0548d8494b44e6dd1fc042bc2faf9028108c8c32e4144f66c8b775b4e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content or phishing pages. No scripts were extracted, but the nature of the links indicates a phishing or malware distribution vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

Heuristics 6

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.
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://technok.cz/wp-content/plugins/super-forms/uploads/php/files/63793f646a33efe9b173d069fb4bf978/95400962193.pdf In PDF document text
- http://chikatere.com/Upload/files/sukaseretivuvol.pdfIn PDF document text
- http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160726c5992267---beledebenumazidijubejum.pdfIn PDF document text
- https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/f454b308c02509d4f01ae1cad1219d1e/86617256544.pdfIn PDF document text
- https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/92fiq36jq7cq66jc0871cljkk4/jebevil.pdfIn PDF document text
- https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/0q3s016p0sg5mfpi59rqoa2mmf/65206596959.pdfIn PDF document text
- https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/e61a2k9fle2iud03li4c6fmc1r/17278202934.pdfIn PDF document text
- http://sam-global.info/files/file/9262350061.pdfIn PDF document text
- https://swift-tw.com/lcc/upload/files/94576083460.pdfIn PDF document text
- http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/ndrmn32koq27a12a7gnc2pgdu0/kuvokeviw.pdfIn PDF document text
- https://betalinktech.com/blmedia/file/ximubu.pdfIn PDF document text
- http://bigpictureresources.com/userfilesbigpicture/file/mesosuwinugojifuroviz.pdfIn PDF document text
- http://mutitar.com/user_img/files/jinaxinexefadut.pdfIn PDF document text
- https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f24d5af084ab8ec6f74fc4e36212c012/tevejiwupubiw.pdfIn PDF document text
- https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/hnb8jtvjunen3qah6e2jeda76b/8061574472.pdfIn PDF document text
- https://alshuka.ps/ckfinder/userfiles/files/5407009026.pdfIn PDF document text
- http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609176e3d81d4---gorez.pdfIn PDF document text
- http://self119.net/upload/userfiles/2021/05/files/210529144232.pdfIn PDF document text
- https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab83360e4fd---norifusit.pdfIn PDF document text
- https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/16096b9be32d3f---pososegesumufugadinifita.pdfIn PDF document text
- https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160771f31f2ae7---wubanezosinogeveken.pdfIn PDF document text
- https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/654ec1c0aedd459eda83db259c6b396f/febajisufawuwutuwam.pdfIn PDF document text
- https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/e6mpjh14njj1p57h7667s96n97/95590067515.pdfIn PDF document text
- http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/a8c88febab206c91e325f851b6892d33/35153649341.pdfIn PDF document text
- https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/8854b24922826c998f2245ec63c5021e/66761068977.pdfIn PDF document text
- https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/e9ae20a796cdbff786f785547826e16e/dimit.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=if+i+could+walk+a+thousand+milesPDF 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_off0000f0b9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0B9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000108d0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x108D0	10868 bytes
SHA-256: `976fa486cc74520292af9a647bbc6a13d6e97248adf590d510198a6a7069c86c`
`font_02_sfnt_off000121c8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x121C8	18144 bytes
SHA-256: `85406d6808e222bb6fa81ed7d0cbfd38641a91cd1b65d19b2f29dd89b4d8c987`

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