PDF malware analysis — malicious · 83e4aa7d78084a1f

MALICIOUS

PDF

87.6 KB Created: 2021-06-26 00:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: e75af030c24a7e38df56e1b8408e53b1 SHA-1: eb33b8e0336231adac2b30699dff7221373710ab SHA-256: 83e4aa7d78084a1fdead1f2b3e63fa0fec2a077ea65cda1f96f8b382e10fdc05

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to other PDFs hosted on compromised websites. These linked PDFs likely serve as lures for phishing attacks or further malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/g5h8vkd2g1509b8bf1efarp6oq/16654742810.pdf In PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5c53507ff---subetowakeje.pdfIn PDF document text
- http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160bfeb5f1b3d9---57711728313.pdfIn PDF document text
- http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160828ed0a289e---85133277213.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d4add5bb9---jifirejakad.pdfIn PDF document text
- https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/6f854c9a6351f20ed150e1a071ec4f2c/vubejanomejebadabep.pdfIn PDF document text
- http://elite-weekend.com/clients/9/94/945a7f92a07ecc721aac768ad340748a/File/ruxogin.pdfIn PDF document text
- https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/6b305bfafe700fe4e08fd0aeceffa69d/nibikasavo.pdfIn PDF document text
- https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/8695acc706098254801929b6158d2bb7/vodufasulofimolawogu.pdfIn PDF document text
- http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e583b9b2434f1e23abc19680afef69e1/94334485238.pdfIn PDF document text
- https://alatheir.com/atheirwsfiles/file/84025411900.pdfIn PDF document text
- http://sattosushi.com/uploads/files/27428458204.pdfIn PDF document text
- http://fitviewer.biz/files/file/nuzixajokixowefizime.pdfIn PDF document text
- http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c3cde161b---bonisijawigirewuxuwibaz.pdfIn PDF document text
- http://quocteanviet.com/img-chamthi/files/saseloguzidejugivuxizugas.pdfIn PDF document text
- https://cplastik.cz/data/cms/file/18342630151.pdfIn PDF document text
- http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/375imib9l7fp1hiocfnsrrre6k/debelu.pdfIn PDF document text
- https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607854b4c72ac---mupurapo.pdfIn PDF document text
- https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/f6536ff57f6255b2b9f776882ded6026/2385757771.pdfIn PDF document text
- http://cappellastudio.it/userfiles/files/dedoforejapiniralobafinub.pdfIn PDF document text
- https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/e2f7c4c9343303f6488ea1cfb2fa4374/vemeladegi.pdfIn PDF document text
- https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160778148af0a1---vomitalulaxofa.pdfIn PDF document text
- https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782dc75e8dc---pefuzopevimozajano.pdfIn PDF document text
- https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/1caaf1ac9a1778dd0a3904dcbb6d70e6/ritud.pdfIn PDF document text
- https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/60467bc9a6e88477d3cc39dae4a3a1a6/34347734189.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=theophany+bible+versesPDF 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_off0000f561.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF561	16868 bytes
SHA-256: `0869aeecc4bb21a9e42e6019647da6121d01ed984f432c83fcec14aef53abd42`
`font_01_sfnt_off00012121.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12121	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013938.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13938	10536 bytes
SHA-256: `ad4e4670b89e75724751ab3964eaa25afed131165c63d1241c10c2ef1a2ec666`

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