PDF malware analysis — malicious · 1c1343856edbd012

MALICIOUS

PDF

92.0 KB Created: 2021-07-07 03:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 27a786224433d1d089264728dd639651 SHA-1: 92f561ae4ea88db8ce260f98238eab4ec78bdca5 SHA-256: 1c1343856edbd01217f0212221c14f9c81415468116a81f646ae3acdce95f557

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content or downloads. The presence of numerous unknown URLs hosted on potentially disposable domains reinforces the phishing and malicious download lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9924

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://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdd92adbf32---70938846090.pdf In PDF document text
- http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/rse5rcqukgma5kotbrj0h608u3/paxizizuvanejedokorabul.pdfIn PDF document text
- https://ismart99.net/upload/files/95183926553.pdfIn PDF document text
- https://an-professional.ru/img/files/file/41022658378.pdfIn PDF document text
- http://targdenunti.ro/userfiles/file/jiromijinivebejejox.pdfIn PDF document text
- https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/844dfbb6a730be2ee4da98834da26ca7/jibefepupapa.pdfIn PDF document text
- https://hoongnau.com/upload/files/lonegeroxemubagitowu.pdfIn PDF document text
- http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609274205deac---zopukiwo.pdfIn PDF document text
- https://arket.io/wp-content/plugins/super-forms/uploads/php/files/h0sscruv22d3imrfv0qkjalgp4/58265501386.pdfIn PDF document text
- http://terralis.eu/catalogue_dynamique/file/vajuzagudonuper.pdfIn PDF document text
- https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/7mm6gjqahel6gss4t8gesn1sc9/63539707504.pdfIn PDF document text
- https://thefertilizerequipment.com/d/files/lujupawam.pdfIn PDF document text
- https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/ea03b4acc7f2bbb67e83b1389f943cec/1595010051.pdfIn PDF document text
- https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/4c31e71683106a8dd9266ed671c44c85/13815963054.pdfIn PDF document text
- http://schokozentrale.de/idata/lubazesadaxupuwug.pdfIn PDF document text
- https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/0ff36c2889817497a5c89f520cb8d16f/nugigewuzefetigafo.pdfIn PDF document text
- https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7f309b725---41680112259.pdfIn PDF document text
- http://ankurgroups.com/userfiles/file/sepimadubiwufesogaludet.pdfIn PDF document text
- http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789d6228cf2---21914826176.pdfIn PDF document text
- http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba79ed3bf7b---wutusixotagif.pdfIn PDF document text
- https://savitravel.ro/ckfinder/userfiles/files/63481594628.pdfIn PDF document text
- http://malbreil.com/userfiles/file/10142302460.pdfIn PDF document text
- https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/372ce1ec88fd6e7149b379b7832d9e0e/pagetub.pdfIn PDF document text
- https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/2b9489f124f6e1d44d21c7241bc4c0f8/fijatetapel.pdfIn PDF document text
- https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c53d1c52660---86232382968.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=acg+player+download+for+pcPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ec94.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC94	10620 bytes
SHA-256: `a3ef0f3fe5fc9af5b31652444ac6c44781daa03f1170c5c4aa4cdbc4a62998e9`
`font_01_sfnt_off000104e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104E1	17528 bytes
SHA-256: `103e0f06fd443b88ac42354c090e9c32350b61d41f002483a416cb20949d414e`
`font_02_sfnt_off000132a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x132A0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off00014ab1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14AB1	16252 bytes
SHA-256: `15510956be7ead9f824e209a6104b8be563ded270a313a9f6e525002084f8b58`

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