PDF malware analysis — malicious · 140be4203f3f3613

MALICIOUS

PDF

82.9 KB Created: 2021-09-04 18:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 7ac94a0319cff53ded03da538240e5b7 SHA-1: 29bfdbbc006c97fc2abd1059ff04a03b896cda96 SHA-256: 140be4203f3f3613d115c00703a51c04bb6ee2c623b3d59dd33c337e1af2b020

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to compromised websites, indicating a phishing or malware distribution attempt. The 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics strongly suggest this is a link farm designed to lure victims. ClamAV detection further confirms its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

Heuristics 6

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.
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://edilgroupdigiovanni.it/userfiles/files/82420239841.pdf In PDF document text
- https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/6d21ce2add0da1dfc1e3e005af547de9/5161259228.pdfIn PDF document text
- https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6345ebaf53---pizopapuduzipigegomamuz.pdfIn PDF document text
- https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d16ef2fff8---17918502109.pdfIn PDF document text
- https://areicon.com/images/file/8802315416.pdfIn PDF document text
- http://ecolservizinettuno.com/userfiles/files/87690005579.pdfIn PDF document text
- http://asfalon.com/__files/file/bofeseguvilabobadodemagu.pdfIn PDF document text
- http://cosyromania.com/media/file/26140309739.pdfIn PDF document text
- https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099bbaf1d3e1---fibemekubesixaguwet.pdfIn PDF document text
- https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607056bdd9c33---39823125785.pdfIn PDF document text
- https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e30b974fc---37645335824.pdfIn PDF document text
- http://friulanapanini.com/images/file/sedamitogomudekabifu.pdfIn PDF document text
- https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/b158debae0b52c313b819e68caef0564/benozigosivakuxitox.pdfIn PDF document text
- http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be6a4c97f96---vawikutubizi.pdfIn PDF document text
- http://mkngsp.ru/upload/files/jeripop.pdfIn PDF document text
- http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ad8bc52a8---kifigerigawapolog.pdfIn PDF document text
- http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd4f7389e8---rawumonajitolejuxanebofet.pdfIn PDF document text
- https://emauto.lv/index/images/up/file/31125944848.pdfIn PDF document text
- https://cecprint.com/images/file/kasamajusaz.pdfIn PDF document text
- https://deepex.hu/hirek/files/60470605542.pdfIn PDF document text
- http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef8e79850f---29817696040.pdfIn PDF document text
- https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612764fe544cd---desobuxowunimakajizumag.pdfIn PDF document text
- https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/ab6891c3f3b4a5da136fbdeba17c22eb/fatisupuxifomefesesa.pdfIn PDF document text
- http://studiorumeo.it/userfiles/files/36484877609.pdfIn PDF document text
- http://angeladaniel.eu/uploads/files/20006021220.pdfIn PDF document text
- https://ecodiagnost.com/ckfinder/userfiles/files/94701820034.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=unionist+party+in+punjab+pdfPDF 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_off0000ddbf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDBF	18352 bytes
SHA-256: `aa91b0004954445e61027837930d7cfc33d4dd43db0b24ec0d376db3867f0e76`
`font_01_sfnt_off00010d1a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D1A	10804 bytes
SHA-256: `62fa19c7789b09e6057313d684ea4cffaf40db453ad12bcf0a64aba83cefd318`
`font_02_sfnt_off000125e9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125E9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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