PDF malware analysis — malicious · 9a5207a5235cb70c

MALICIOUS

PDF

94.1 KB Created: 2021-08-06 23:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: d21a17f7936165b73aa899311dc2b758 SHA-1: 6175cb17d9d70dd3e1853cdf3ec226b1c4207965 SHA-256: 9a5207a5235cb70ce0305c5df5194009053887af90e3ab38e1bfaa21a35636f1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are indicative of a link farm used to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9914

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://coretry.ru/uplcv?utm_term=arun+sharma+quantitative+aptitude+amazon PDF link annotation
- http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/akp85dlm5clgd9quj3im5en631/95177528855.pdfIn PDF document text
- https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf124049898---pepolaz.pdfIn PDF document text
- https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/hs19ctvc6hn94v8sg9rjhvtaa0/4973467078.pdfIn PDF document text
- https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/420b75217e4fab71ca7d7f5f8d16a21c/xarisiruteberisegepepuna.pdfIn PDF document text
- http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd77a70c35---menutaligiwotoxekekalone.pdfIn PDF document text
- https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/a6bb1dfed105936f640dad4d294a77c7/vizazup.pdfIn PDF document text
- http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/351fbaf7071156035188ef1c08982caa/megamu.pdfIn PDF document text
- http://bannails.com/fckeditor_userfiles/file/52491538617.pdfIn PDF document text
- http://hnatiukreunion.com/clients/b/b5/b5561851e3069b632e798ef7a1275556/File/sipemu.pdfIn PDF document text
- https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bc204e32e5a---guwako.pdfIn PDF document text
- http://waterlootour.com/FileData/ckfinder/files/20210702_974DC2E2200B924A.pdfIn PDF document text
- http://gsoutreach.net/clients/e/ea/ea4f28bd0b090870cbed8536b6d1d406/File/91750950339.pdfIn PDF document text
- https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/d22cebe8e861e90ab056cbfe3bc60dc4/10315169161.pdfIn PDF document text
- https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a80440a44815a503ccd9c57a7a0e64e1/55488680656.pdfIn PDF document text
- http://studiofranzoni.eu/userfiles/files/3711275353.pdfIn PDF document text
- http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607934436e6d7---95326243330.pdfIn PDF document text
- http://futurepoolandspa.com/ckfinder/userfiles/files/pasawot.pdfIn PDF document text
- http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160807dba1517c---83108670110.pdfIn PDF document text
- https://pearproperties.in/userfiles/file/degise.pdfIn PDF document text
- https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/8eccbd4cb1dc7d625e6d2b010744af5c/31689726510.pdfIn PDF document text
- http://hzzxtl.com/UploadFile/file/20210616043206648.pdfIn PDF document text
- https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/6c53c8f0ab3c1e531894d0826cb3321d/77680247431.pdfIn PDF document text
- http://iglozawiercie.pl/zdjecia/file/kejavokufebeji.pdfIn PDF document text
- https://mavibusiness.it/file/nipiwununugajapazomosovud.pdfIn PDF document text
- http://prestizhstroycompany.ru/SITE/files/editor/file/pawupid.pdfIn PDF document text
- https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/5649118e6cb7560264efc60601e563b0/36642097762.pdfIn PDF document text
- 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_off0000f32f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF32F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010b40.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B40	16820 bytes
SHA-256: `48dbd217770ad16c16ba318e46439ea3d249384abb63d235809b33083ad7dae6`
`font_02_sfnt_off0001235e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1235E	16968 bytes
SHA-256: `94d806eb27dd002a60b6ea42728ced1ba19ba152f2373130ca91e7c6e30b6242`
`font_03_sfnt_off00014f9d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14F9D	10964 bytes
SHA-256: `8cb5f3397dee19f095afa9d4c32ec74828bbd3199085db8babd3f7a94eeeffe3`

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