PDF malware analysis — malicious · d078f32c45353d9c

MALICIOUS

PDF

88.0 KB Created: 2021-07-13 02:31:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: 50ed2d73de0f1cb5af0ba9777a511925 SHA-1: e8a633731705d5a37c5dc58bf853ab83e553de4e SHA-256: d078f32c45353d9c0a4ee27c97113f9ac22124e51018fa07d37fe15efef0c66c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated high maliciousness. It contains a link farm pointing to multiple compromised WordPress sites, suggesting it's used to distribute malicious content or redirect to phishing pages. While no scripts were directly extracted, the nature of the URLs and the detection names point towards a phishing or trojan distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c495991475d---27872416632.pdf In PDF document text
- https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/0465b8ef9b04885b4ba7448d7e93a603/7883756286.pdfIn PDF document text
- http://hi-techfiber.com/userfiles/file/81409001335.pdfIn PDF document text
- https://chupwo.com/editor_upload/file/jizepolivuxuw.pdfIn PDF document text
- https://caribemed.com/userfiles/file/pirogivopamufamuj.pdfIn PDF document text
- https://contabil-fiscal.ro/mm/file/30069247104.pdfIn PDF document text
- http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ecc844e78---xupedifitofuralejovebaf.pdfIn PDF document text
- https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/05d69abec7c80a07d8a9cbe80006ae76/53727746120.pdfIn PDF document text
- http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160737ca4cd8d1---21158670682.pdfIn PDF document text
- https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/67a004da857536a6ad7744f1d21230ed/jelotimasefanak.pdfIn PDF document text
- http://drkoopman.nl/cmsimages/file/84341546.pdfIn PDF document text
- http://mastera-mix.ru/ckfinder/userfiles/files/91926720795.pdfIn PDF document text
- https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16094c7b852d16---sesugosijopevebesi.pdfIn PDF document text
- https://karapinarinsaat.net/userfiles/upload/file/bewivapazaramonekud.pdfIn PDF document text
- https://cafesca.mx/ckfinder/userfiles/files/mogajadasojirapun.pdfIn PDF document text
- https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2417861728---livoromajeruxu.pdfIn PDF document text
- https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/1faa44652d1af4526ac67dbdbd52f8d5/wonisun.pdfIn PDF document text
- http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/0kaduj0jtdru7srr2uakd0o790/malolalifotizewexuku.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945d3935e71---49405643753.pdfIn PDF document text
- http://a-swiss.com/upload/userfiles/file/puzulerozopafejen.pdfIn PDF document text
- https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca8b515bd6---goreguxemopupolexodazapu.pdfIn PDF document text
- http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a87c952b6---2177745816.pdfIn PDF document text
- http://erdbau-rauch.at/61192877073.pdfIn PDF document text
- http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d690f0532---1584522404.pdfIn PDF document text
- https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/7ed140f202e18c848bf531bd7dcfb4db/lexigepoguxomomufuwumo.pdfIn PDF document text
- https://t2sc.me/userfiles/zexobewawemibidadawupu.pdfIn PDF document text
- https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c02ea5fdbe---82642890985.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=php+redirect+without+changing+urlPDF link annotation
- https://mediaget.com/userfiles/files/tuwazifomozufopaji.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f31d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF31D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010b34.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B34	10812 bytes
SHA-256: `b1be494e14c274f483e2aafb68ac9d6d174a3a684a6f546b01b688dec95268de`
`font_02_sfnt_off000123e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x123E1	17636 bytes
SHA-256: `20fc1d547202f9e8adca3cc6b0cf1c29bfa9526dc32cc87010349658971301e6`

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