PDF malware analysis — malicious · 243ce3475986993d

MALICIOUS

PDF

97.2 KB Created: 2021-06-30 00:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 9e04fd71c5f01abb0c127802f1fe0929 SHA-1: ebf424f97869ea925cb1aeb084b9cce0e8d8c46d SHA-256: 243ce3475986993d0b8b274b1424a33bc211d553ae7bc2341e550d3d276f9620

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript T1553.004 Mark-of-the-Web Bypass

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external sites, many hosted on compromised WordPress installations, suggesting a link farm or download lure. Crucially, it includes an instruction to disable security software, indicating an intent to bypass defenses and likely download a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9910

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
Security software disable instruction high SE_SECURITY_BYPASS

Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
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://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e8cdb70681fd2d717c2c2f7bd8df17b6/33498559535.pdf In PDF document text
- https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/227343885a78c200660ff7ca4341524e/90987239694.pdfIn PDF document text
- http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16093ccc78e01b---lulelupujeb.pdfIn PDF document text
- http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e57171541a---tulapizukosezanubugi.pdfIn PDF document text
- https://ngusacdon.com/upload/files/35886333697.pdfIn PDF document text
- https://haysalon.com/public_html/userfiles/file/27080433245.pdfIn PDF document text
- http://ventilatoryzlin.cz/images/file/vigovakula.pdfIn PDF document text
- https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b11116b73d9---zaluj.pdfIn PDF document text
- https://susta.vn/userfiles/file/27173404360.pdfIn PDF document text
- https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/efomj3b4hjvdmq2rr4i60frjt7/10654899805.pdfIn PDF document text
- https://upchealth.net/wp-content/plugins/super-forms/uploads/php/files/ce7c8c73f224a0ca5447df6ae36fee92/6745691363.pdfIn PDF document text
- https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/kf9me8bqi0j3bgmjdqn2075nh4/rebezisexebafiv.pdfIn PDF document text
- https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/gpqbq4s4p1qavho6euppm7n604/78841991129.pdfIn PDF document text
- https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/98c4d8407efb5438a02c7bb95558b841/60529765901.pdfIn PDF document text
- https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/7a36f6b51a8869381ce11d572d13c9e2/29934446430.pdfIn PDF document text
- http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/el3ebet1aimrgjedh6uslt8kk3/32435868365.pdfIn PDF document text
- https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/ad7106c86bf71b049782f0e2e845bc1d/55844141923.pdfIn PDF document text
- https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/7mhk83i8qaljqq0nkmsafesd0f/41242922255.pdfIn PDF document text
- https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/1487dae708713a49777cbe57c84ee969/62609270938.pdfIn PDF document text
- https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/ff8de075fa51041f70a0e96d52992709/moserero.pdfIn PDF document text
- http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160982be9e7458---dosijutefavugafikejaron.pdfIn PDF document text
- http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/jfe7b85pdt2bnn65bg5ii5ull2/maxexudezaxatarul.pdfIn PDF document text
- https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca29771e3f---38532115060.pdfIn PDF document text
- https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be8e1eecb2f---rawemewepevuwavo.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=five+nights+at+freddy%27s+2+download+pc+full+versionPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fc42.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC42	17548 bytes
SHA-256: `23df4abb90fae606082cc38859028f5d8175b3efb86257164308dbad0f1b8e79`
`font_01_sfnt_off00012ac5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12AC5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000142dc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x142DC	11396 bytes
SHA-256: `b1b7461066b08f264512b7c0a3fee577ce85bb00d82d001ecfbcd3d85b0336f6`
`font_03_sfnt_off00015da2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15DA2	17216 bytes
SHA-256: `12c53374d8fcd0833faed05ac44f231b9aaf9848276177f9235a89f03f3f6b8e`

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