PDF malware analysis — malicious · 29c21caf8f8a50db

MALICIOUS

PDF

88.4 KB Created: 2021-08-31 20:06:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 0198cc338a0ab49fab1d79914c97ce07 SHA-1: 9a8e0c2fd5da872a0bf6f0e341e35dc111c91549 SHA-256: 29c21caf8f8a50db370ee12a8b8bbb6598c237dbfe7e68ef563b99518babec94

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely serve as a distribution mechanism for phishing or malware, leveraging the 'utm_term' parameter to potentially influence search engine results.

Machine Learning

Nyx PDF Classifier malicious score 0.9746

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://smidgel.ru/uplcv?utm_term=wordly+wise+3000+teacher%27s+resource+book+6+answer+key PDF link annotation
- https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/6f7i0bsdcdshvg082go8om30qf/58961344944.pdfIn PDF document text
- http://goldartline.ua/userfiles/file/75201128293.pdfIn PDF document text
- https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/2b232cd11f00cec3fde6075832b9fd4e/gamuputeda.pdfIn PDF document text
- https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/ddf0d91c6c4679d49efcdda02b681b53/74184894210.pdfIn PDF document text
- https://epiphanych.com/images/file/sodupuj.pdfIn PDF document text
- https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/813c813e158dad3a0f05414bf5a93a7b/74270614286.pdfIn PDF document text
- http://kgmda.com/upload/files/8053632866.pdfIn PDF document text
- https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/6277074f8e826ff7410cc5994c40832b/57832662442.pdfIn PDF document text
- https://cottonweb.net/userfiles/file/52916998335.pdfIn PDF document text
- http://www.startservis.sk/novy/ckfinder/userfiles/files/74338246427.pdfIn PDF document text
- https://keongracun.org/contents//files/85853224826.pdfIn PDF document text
- http://jessie.vn/images/ckeditor/files/tesevazireziselokatugok.pdfIn PDF document text
- https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/161092d894cf20---86708524530.pdfIn PDF document text
- https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072dc9183be6---4218976012.pdfIn PDF document text
- https://ethnicminorities.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/gisap.pdfIn PDF document text
- http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e282f27058---72457162408.pdfIn PDF document text
- https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/961b38cbb6b8014d0edd443a77c251c4/kazogu.pdfIn PDF document text
- http://zuche0551.com/upload/file/kawalijiwani.pdfIn PDF document text
- http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/5h5m0l3ek9201ujf75bhbu9hp6/51365768630.pdfIn PDF document text
- https://highrise.pl/file/vanofizuxafugisemeboporon.pdfIn PDF document text
- https://numen-wow.com/userfiles/cloud//files/detokosepi.pdfIn PDF document text
- https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/7762683842.pdfIn PDF document text
- http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cbfcf2cbe1b---pejikizamowokabovulo.pdfIn PDF document text
- https://perfecthospital.org/FCKeditor/file/80343710564.pdfIn PDF document text
- https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/df96609ef51c2a9a8a9f6438bd08a9be/39148964924.pdfIn PDF document text
- http://logiccpacma.com/ckfinder/userfiles/files/87870092057.pdfIn PDF document text
- https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/1187fe7dac35f2f8641b042f691d4dd3/nugujixejadagor.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ddcb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDCB	11488 bytes
SHA-256: `6f1a721a18254b352e2117b84a2d9c005123a45535be3ff8191911f48b06e501`
`font_01_sfnt_off0000f90c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF90C	21632 bytes
SHA-256: `464fcfa21617717c6e1b2e1fde5a8a6d60ea529fbdcd2a93aff0cbfdf27ba3c9`
`font_02_sfnt_off00013222.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13222	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off00014a2f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14A2F	1900 bytes
SHA-256: `bced27375cd583721c63a2fc82da436771f52a2ccdb522a0980e792e2f9a23bb`

Open this report in the interactive analyzer, or submit your own file for analysis.