PDF malware analysis — malicious · d93cd6241371140e

MALICIOUS

PDF

80.2 KB Created: 2021-08-21 10:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: f09d3ccb84766d205fc7f439671a9197 SHA-1: 82ab6fcdbb34c854419d3ffbec09f5018ebed3c6 SHA-256: d93cd6241371140e2e25e73d642f7e307d5819b23c7bf96ad7ecaed306241dda

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was detected as a phishing trojan by ClamAV and flagged by an ML classifier. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9938

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://cobansut.com/userfiles/file/78156316180.pdf In PDF document text
- http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cdea1d791f---xefasalu.pdfIn PDF document text
- http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/fooq8n0b271kh964893onu255f/wivemarirofepewe.pdfIn PDF document text
- https://albawadiroad.com/userfiles/files/lakunakuta.pdfIn PDF document text
- http://schooldistrictservices.com/clients/f/f6/f6ab1571d2cdf5e569af7b76e288b17c/File/poxitizinexiwiruxesa.pdfIn PDF document text
- https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ee45fmfb56k6j0lsr8ebqu4dm3/2253616465.pdfIn PDF document text
- http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a18db2cf96d---galuwozaxosomenobux.pdfIn PDF document text
- https://area34.info/wp-content/plugins/super-forms/uploads/php/files/sh8po7guukkpahvkomq2fif3m5/regufivufapumafew.pdfIn PDF document text
- http://coffee33.ru/archive/file/bodimepazosibi.pdfIn PDF document text
- https://behagi.eus/files/galeria/files/47592006512.pdfIn PDF document text
- https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/01ef25807da1130acf9540f887815405/dedujurimasevafubit.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf1c4e3da02---temirubusedolonekovoxen.pdfIn PDF document text
- http://upsshop.ru/ckfinder/userfiles/files/84079523741.pdfIn PDF document text
- http://blackivy.pl/userfiles/file/9159667950.pdfIn PDF document text
- http://hoteldarim.ir/basefile/hoteldarimir/files/bedakisefumowib.pdfIn PDF document text
- http://fautographie.org/images/userfiles/files/16715306261.pdfIn PDF document text
- https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/fk1k40fjjken6uh4i513pdd5s1/28764449711.pdfIn PDF document text
- https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0a1b44eaa---4975617741.pdfIn PDF document text
- http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ed9820b3b---64657521611.pdfIn PDF document text
- https://linoforti.it/file/pilojoruvalikonogevukenaw.pdfIn PDF document text
- https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f58f6d41ea---xinogaf.pdfIn PDF document text
- https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d0f0e292a---nimiwetif.pdfIn PDF document text
- https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/6871836e694e54b9dc6094e6b87e6531/jubexamutujabuja.pdfIn PDF document text
- https://ferest.ro/imagini_ws/girisukij.pdfIn PDF document text
- http://teranor.com/ckfinder/userfiles/files/dixekesirerujekegazajusim.pdfIn PDF document text
- https://abugfreemind.com/userfiles/file/55614725873.pdfIn PDF document text
- http://ersatzmonitor.de/userfiles/file/27450606026.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=diviser+par+10+100+ou+1000+exercices+%C3%A0+imprimerPDF 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_off0000d2aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD2AA	10916 bytes
SHA-256: `7bf13fbfdb1eb63aea73b40e957a8307b63d66ae0ee654eaa30145641187ee0a`
`font_01_sfnt_off0000eba3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBA3	17452 bytes
SHA-256: `a71dd364b37b353c56c3b1186d49fa96d686ee431f9a626b699512a3c8f7e69f`
`font_02_sfnt_off000117b8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x117B8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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