PDF malware analysis — malicious · 3b7a9bda78d8359b

MALICIOUS

PDF

86.2 KB Created: 2021-07-01 22:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: ca1416e865c123203794fbfcca0caab9 SHA-1: 125b7be26a8e5c933d46ba32b55e500b130dde4b SHA-256: 3b7a9bda78d8359b66741339d44d5608dde0bcbd883d6e84f24eec492235edc7

176 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF contains numerous links to potentially compromised websites, including WordPress uploads, suggesting a phishing or malware distribution attempt. The heuristic 'SE_CALLBACK_LURE' indicates the document may also be designed to trick users into calling a fraudulent support number. While no scripts were directly extracted, the presence of multiple external links and the ML classifier's high confidence score point towards malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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 https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a292b5830e5---jekatugojowiripoxukajul.pdf In PDF document text
- http://rszm88.com/upfolder/e/files/20210620022359.pdfIn PDF document text
- http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160804fc7642f5---pasezaxavijik.pdfIn PDF document text
- http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/43h9jr100q1ac2mupm5egcagl4/nibusezisesipomoteburibut.pdfIn PDF document text
- https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/59f2f10db84bd69047e6b747c5e19e53/robozobuza.pdfIn PDF document text
- http://keralabiblesociety.com/fck_uploads/file/11590021844.pdfIn PDF document text
- https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/070fb3c3e1dca2c65d5685a4a573cc7a/mokojafitafoxon.pdfIn PDF document text
- http://lncxjzxxw.com/upload_fck/file/2021-6-30/20210630082837458730.pdfIn PDF document text
- https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b54c09d3f06---12887605112.pdfIn PDF document text
- https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/qn5l9spkr0g9afi2gquu0ip6ep/96153906662.pdfIn PDF document text
- http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/db57607e3c3364d872ce69daa7e7cd81/degisade.pdfIn PDF document text
- https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/23cae29424070078b5e0e9b52b1ed617/rexemowuzizudodazamupogo.pdfIn PDF document text
- https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/b3c08b71b6ac64a72d015f43bb603884/98864024147.pdfIn PDF document text
- https://farmacieitaliane.com/documenti/file/62340575414.pdfIn PDF document text
- https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/eebavvjmlsq0h804r31a24oqad/71042722749.pdfIn PDF document text
- https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a154bc23ff1---dajajitifeponudawufigaga.pdfIn PDF document text
- http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/c1d1785e36042cc16dca5b283ecfa090/zoxegezuloxeravatesa.pdfIn PDF document text
- http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982672acdc3---toxeduma.pdfIn PDF document text
- http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a59daa2d77f---41910211785.pdfIn PDF document text
- http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/05d3r20kgr647rar6mvi7vvup1/fatasepabodapebuxijowe.pdfIn PDF document text
- https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/c28ad0ac1b9c6f448928c9ff673f493f/tugusetabed.pdfIn PDF document text
- http://the100voicesofgospel.de/fichiers/newsletter/file/dorinodipevovufola.pdfIn PDF document text
- http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609689fad5086---fovureg.pdfIn PDF document text
- https://bd-sokolovska.eu/userfiles/file/2475463842.pdfIn PDF document text
- https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/dca5e142b795d92d5809d0c96bce1392/vimazov.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=sedgwick+county+active+warrant+searchPDF 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_off0000eb0e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB0E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010325.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10325	11136 bytes
SHA-256: `54190673c8e57550e1db751856c4d39f6012b90b2b82da4a93d179f14faf76eb`
`font_02_sfnt_off00011cfd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11CFD	17248 bytes
SHA-256: `1f122612d55e2ce4f22fbe18d98f22c353359e0473963d4dafc01e97df78c344`

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