PDF malware analysis — malicious · af3903f54697d6a7

MALICIOUS

PDF

169.3 KB Created: 2021-07-16 14:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: d2c0e72e33020fe5eaa0734641a17779 SHA-1: b74e8862807d43e9ae59fe4025d96d2b0988647d SHA-256: af3903f54697d6a7f144d8863e2064e3183a40034d39876660abbb2ecd68641b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm hosted on compromised WordPress upload directories, suggesting it's designed to redirect users to malicious sites. The presence of multiple links on potentially compromised infrastructure points towards a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9689

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 http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc1a1a4f39---bamozisadojutobidu.pdf In PDF document text
- https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160840c94d533a---kiwarataso.pdfIn PDF document text
- https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/pd407mkcqbb1621f5qpkm6ui83/27518074389.pdfIn PDF document text
- http://aire-limpio.com/img/editor/file/mujujigesonabakebuperebeg.pdfIn PDF document text
- https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a49770be9aa---54967409964.pdfIn PDF document text
- http://bugaboo-buffalo.eu/UserFiles/File/45901482774.pdfIn PDF document text
- http://chekeeh.ir/basefile/chekeehir/files/78970849927.pdfIn PDF document text
- http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774def62a2e---mepolobifovojata.pdfIn PDF document text
- http://hrdiborice.cz/erucom1/files/files/fukim.pdfIn PDF document text
- https://retta-bg.com/userfiles/napilenemuput.pdfIn PDF document text
- http://lukinserv.hu/file/92668390384.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987ba55e0f7---22867478588.pdfIn PDF document text
- https://clumba-indoor.ru/files/files/13916644908.pdfIn PDF document text
- https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/0a265777953ddf7b7c7b68620a02df91/67968220006.pdfIn PDF document text
- http://aaaexpressac.com/userfiles/file/vivexin.pdfIn PDF document text
- http://bazis-expertiza.ru/ckfinder/core/connector/php/files/gategesaxijuxetatakufawim.pdfIn PDF document text
- https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/2845162874.pdfIn PDF document text
- http://asesorgubernamental.com/images/file/26939912622.pdfIn PDF document text
- https://cleaner.pl/userfiles/file/14620104776.pdfIn PDF document text
- https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/a5df57c9c881e0679145cf3a5e5d8c63/tizurabozutunepudomote.pdfIn PDF document text
- http://alconburyreunion.com/clients/36523/File/18737837282.pdfIn PDF document text
- http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ffcc517891---xakobitosezobuvajimedener.pdfIn PDF document text
- https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc262bef74---91611671247.pdfIn PDF document text
- http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607836b06784b---figedagamukivu.pdfIn PDF document text
- http://attlas.center/userfiles/file/942933092.pdfIn PDF document text
- https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/fb8ijgfk9cl9m6dofhivv6pp0l/49548144680.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=ad+hominem+argument+fallacyPDF 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_off000236c8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x236C8	17824 bytes
SHA-256: `13d8882605d83da146542d7e69874153af17a412d4af145367a9fc3c1d939a5d`
`font_01_sfnt_off000264f6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x264F6	10948 bytes
SHA-256: `efd3d2d8606ccac9f4f260aab52977de3f3b8ef147a19de01a68f5e53391ded2`
`font_02_sfnt_off00027df9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x27DF9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.