PDF malware analysis — malicious · 1aa379546293eff8

MALICIOUS

PDF

101.8 KB Created: 2021-08-20 15:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27

MD5: 334e8c265918a44ec6c2d3e18b728f96 SHA-1: 81520458158f0af07d5f06a5e8749beb5953b068 SHA-256: 1aa379546293eff8f38813170f76600592b2b645e4de19eff5ad24a331aa2a52

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations. The presence of 'utm_term' parameters in some URLs suggests a phishing or tracking intent, aiming to lure users to potentially malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9878

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://huntic.ru/uplcv?utm_term=michael+herschmann+funko PDF link annotation
- https://hantverksakuten.se/ckfinder/userfiles/files/niwezufidipotutafukugobo.pdfIn PDF document text
- http://edison76.com/clients/5/54/54c13950cbd15a81e6fb4362eab8f273/File/14425713510.pdfIn PDF document text
- http://johnmarzillier.com/ckfinder/userfiles/files/18656706895.pdfIn PDF document text
- http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/8abd78722d233a54e81058104b93f9ab/84670346893.pdfIn PDF document text
- https://speakingparrot.com/upload/ckfinder/files/xerusesazoneparijegekuba.pdfIn PDF document text
- http://mdtrend.hu/files/file/53084742950.pdfIn PDF document text
- https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/3a53886da6dcde0ef291c3ec6d19c415/16511894870.pdfIn PDF document text
- http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/320r4v1m8944i1eutq8h4742h7/6097492957.pdfIn PDF document text
- https://aadhaarretail.com/administrator/imagetemp/file/doladerukikawejuna.pdfIn PDF document text
- http://coyada.com/up_images/up_images/45987150229.pdfIn PDF document text
- http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160848028c0a80---wamedaweg.pdfIn PDF document text
- http://ckrestaurantgroup.com/ckfinder/userfiles/files/4949961457.pdfIn PDF document text
- https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/pbbdan1nvm3t0r0ti099h3sc0b/ragopemuwinawozixiwil.pdfIn PDF document text
- http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609c037c4d026---sipowunajuserisejivipid.pdfIn PDF document text
- http://tpdw.pl/userfiles/file/zanoforegafe.pdfIn PDF document text
- http://anhuishangbiao.com/upload_fck/file/2021-5-20/20210520132231221708.pdfIn PDF document text
- http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b82d9411c50---tasolanususofaramex.pdfIn PDF document text
- https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/9vhefl7q86cvlatghhlf4qib2b/39763672260.pdfIn PDF document text
- http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/86142579840.pdfIn PDF document text
- http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610a29d11fdab---28588028498.pdfIn PDF document text
- http://himalayakebab.com/shipinc/userfiles/files/5669107873.pdfIn PDF document text
- https://valenciamaids.com/userfiles/files/zitoritosujariziminibewow.pdfIn PDF document text
- https://my-natural-style.net/upload/files/66662801639.pdfIn PDF document text
- http://ytbozhuo.com/upload/file/07173809617.pdfIn PDF document text
- http://soveyautoparts.com/htdocs/cljr/data/files/58727360682.pdfIn PDF document text
- https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/b3c62509557a6ec5ebd3ec8e1536a10d/31998521139.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_off00012aee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12AEE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00014300.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14300	17436 bytes
SHA-256: `e2ff7177475a76cb24e501927c0c62302c6eece9059ce6ac246d1ffd3d14fe83`
`font_02_sfnt_off00017000.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17000	10688 bytes
SHA-256: `6fb4463982d9b2dfee4fcc0ee08c3f066a16e1ed1d8915922172e5468333025c`

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