PDF malware analysis — malicious · d67c4b4518d418de

MALICIOUS

PDF

87.0 KB Created: 2021-08-04 00:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02

MD5: f422d07dc7c7086cc97fbe5a14f503a3 SHA-1: ca295097ec80fd25ee27b9ce630d02b15120913c SHA-256: d67c4b4518d418de9a3a878b100cb1c7b7d05a2ca38c55057213a152c4b4066b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document functions as a link farm, containing numerous URLs pointing to various domains, some of which appear to be compromised CMS upload directories or disposable hosting. The primary purpose seems to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9919

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://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/rimewotaluvofeniburimibez.pdf In PDF document text
- https://brazilairporttransfers.com/ckfinder/userfiles/files/zipitobitisires.pdfIn PDF document text
- http://indianspringhomes.com/userfiles/files/tiruvejumujazojobase.pdfIn PDF document text
- http://millecolori.it/images/file/jaloteriwekiv.pdfIn PDF document text
- https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/8fc115848b40f9061c9d01c14dc7371c/65133949861.pdfIn PDF document text
- http://lamekatus.com/uploads/ckeditor/files/9822260279.pdfIn PDF document text
- http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160adaedbb4a2f---vurewuxasofiziguvenawu.pdfIn PDF document text
- http://rajhansnursery.com/userfiles/file/70250368375.pdfIn PDF document text
- http://frezerovka.by/images/fxeditor/file/fegagofobidudolubimibitip.pdfIn PDF document text
- https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/kqriv1t0oadm3k7do4253tcbn3/gezirumatidubukeguvaru.pdfIn PDF document text
- http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/96706083614.pdfIn PDF document text
- https://roomart.uz/ckfinder/userfiles/files/93420220861.pdfIn PDF document text
- http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc14506177---mowujodovavi.pdfIn PDF document text
- http://staresecurity.com/userfiles/file/31849720130.pdfIn PDF document text
- http://firstcuwire.com/file_media/file_image/file/lobafebogof.pdfIn PDF document text
- http://allycatering.com/userfiles/lejobur.pdfIn PDF document text
- https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/d79faa5d2ae3f3cc560e7968eda4961e/15113486460.pdfIn PDF document text
- https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/8282a20ddfaaf99ec91868b585fc5c4d/76100185557.pdfIn PDF document text
- https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/ad408ec114a2ae4def54eb4c84c20498/81518638240.pdfIn PDF document text
- http://eshop-kocicinadeje.cz/files/file/72285257024.pdfIn PDF document text
- https://www.bussmann-tiefbau.de/ckfinder/userfiles/files/jexajob.pdfIn PDF document text
- https://hotnews.md/upload/userfiles/files/63357187026.pdfIn PDF document text
- http://softtox.com/new/userfiles/file/vuzosufaveba.pdfIn PDF document text
- https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1609621c5d3fa9---lumufopisute.pdfIn PDF document text
- https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/a04f91f8910a12da289e4a017a2e291f/36550855453.pdfIn PDF document text
- http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c9bbbcca0---kubibipilonememara.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=dibujos+a+l%C3%A1piz+faciles+para+ni%C3%B1osPDF 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_off0000ed0a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED0A	11192 bytes
SHA-256: `6e8b0d96a0ee114014453a39c2c5ab74e6195850fc9752f247231a00d2b1c406`
`font_01_sfnt_off00010677.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10677	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011e89.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E89	17680 bytes
SHA-256: `752b7f4bac9aeb1961204ed38cb1a07b7da329414823aa30f94133ae53a25b9e`

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