PDF malware analysis — malicious · 6d4988f41867c99e

MALICIOUS

PDF

72.9 KB Created: 2021-07-06 02:34:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 22de700ae46acf496c7effd1c85b31f5 SHA-1: f87cf7a9203f6e1e5430bb7f2bea5c63370e3b15 SHA-256: 6d4988f41867c99e1a3a1fb3559080791bd3f8ab5cc6d72f8da338b7eac29978

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised websites, suggesting a phishing or malware distribution scheme. The file's structure and URL patterns are consistent with a link farm designed to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://medvor.ru/uplcv?utm_term=fabless+the+transformation+of+the+semiconductor+industry+pdf PDF link annotation
- http://www.mmalappeenranta.com/tiedostot/files/zagidokuzolilelowol.pdfIn PDF document text
- http://agcslohian.com/userfiles/file/97063512259.pdfIn PDF document text
- http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc292bd98a---bexamim.pdfIn PDF document text
- http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16085eaf96340f---zonanirusitibikere.pdfIn PDF document text
- http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7826d1d14---69489173930.pdfIn PDF document text
- https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/e4bbc9cbb40ecf713e40be58d260cd69/patutagufurisogodogoma.pdfIn PDF document text
- https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/ap75p02mc2mk25bii4f8v4k3ac/fipanavurirewadel.pdfIn PDF document text
- http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097bb5339e10---36513092934.pdfIn PDF document text
- https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160965e959e530---49643035587.pdfIn PDF document text
- https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081d3eb90b0e---65744881882.pdfIn PDF document text
- http://altinay-law.com/images/file/62830885199.pdfIn PDF document text
- https://a1-recruitment.fr/v2011/Files/fck_upload/file/lanalifodegaw.pdfIn PDF document text
- https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/0d643a3c44695ed148369df6c6dc5441/60659718737.pdfIn PDF document text
- https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/cdreejs7f8dogoi4c10vss8spo/51445023299.pdfIn PDF document text
- http://jandebruijn.com/uploadimages/files/2637843357.pdfIn PDF document text
- http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160a12403214dd---nedapuvosid.pdfIn PDF document text
- http://historia-bfured.hu/userfiles/file/33433900430.pdfIn PDF document text
- https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bcacb8ebe0c---lisedunab.pdfIn PDF document text
- http://18554080.com/userfiles/file/xevubizazekovabij.pdfIn PDF document text
- http://marcobernini.it/userfiles/files/kewijonawomubovosajef.pdfIn PDF document text
- https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/24495c66298d6be9aecbf962409dda71/nelipisaxesexivik.pdfIn PDF document text
- http://school19-zav.ru/userfiles/file/12965141898.pdfIn PDF document text
- http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16072f1c55bb98---93361468956.pdfIn PDF document text
- https://pristineleather.com/userfiles/file/zumamenefebebevapas.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_off0000baf5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBAF5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d30c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD30C	11216 bytes
SHA-256: `93ba6e83c86619a740f0b4f03e6d8facc41211273d085840c3d9dac93e042c69`
`font_02_sfnt_off0000ecf3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECF3	15880 bytes
SHA-256: `4d317c97a732b0efc032da69066c53086fb6c09a5f2a6c7ebbea70c1621b0507`

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