PDF malware analysis — malicious · 3a7580b60b69490d

MALICIOUS

PDF

85.1 KB Created: 2021-07-06 20:32:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 9afa930a5ef539715ff279fce37b54a8 SHA-1: bc88418a7032d3c5e63592319f086f8ed6dec59a SHA-256: 3a7580b60b69490d109ac6c051f7c9e73852e47b8d098ae5ebab983a0a241d3d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites. These sites, in turn, host further PDF files or redirect to other malicious domains, suggesting a multi-stage redirection scheme likely designed for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://allytemp.ru/uplcv?utm_term=cbse+class+7+math+solution+by+rs+aggarwal PDF link annotation
- https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/cgg4ik4be2hcl0ut513qn6haqu/pamubaxe.pdfIn PDF document text
- https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf3bc9e47b---vesudogajufo.pdfIn PDF document text
- http://timandlor.com/userfiles/file/16991569332.pdfIn PDF document text
- https://myphambambi.com/webroot/img/files/6703172722.pdfIn PDF document text
- http://perles-del-beya.com/userfiles/file/banoziwedigiraxanira.pdfIn PDF document text
- https://gencshoworganizasyon.com/upload/ckfinder/files/68170604911.pdfIn PDF document text
- http://atrsara.ir/resource/files/ziletagoveluzo.pdfIn PDF document text
- https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/c7897ac3e38f2938f7b6da174426a95a/7501244871.pdfIn PDF document text
- http://aite-materials.com/upfiles/file/55773048629.pdfIn PDF document text
- https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/424nnfnmhpm4ukqdr3fqfpfhe3/90225767013.pdfIn PDF document text
- https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ccdb4c5bea9---7401387309.pdfIn PDF document text
- http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f863fb8ce5---90050182903.pdfIn PDF document text
- https://houstoncoinshow.org/FCKeditor/file/durusolosupejilolipes.pdfIn PDF document text
- http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab99c348e8c---falenatevijisipinamawixi.pdfIn PDF document text
- http://hollandunitedreunion.com/clients/5/52/52f3fdf721cdccceb566e47094f1d9de/File/zawisutixizabuduzaseno.pdfIn PDF document text
- http://renovator.cz/files/file/navenajurixokebudutiti.pdfIn PDF document text
- http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/0b4c4f77e42683ea4ee047d71b7a4f0a/75142054475.pdfIn PDF document text
- https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/6nlk1027ejnvrotl7o55scgvdi/62603643123.pdfIn PDF document text
- https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/bc5d3d1e97eb32c82dbea78a5a63ea13/worisuriluz.pdfIn PDF document text
- http://gaskinfamilyreunion.com/clients/b/b7/b798c9f9e2af69c3a5b950a06e4ade8e/File/37936888593.pdfIn PDF document text
- https://bangprice.combangprice.com/beta/cms_image/file/toturowigojepokis.pdfIn PDF document text
- https://valve-toho.com/userfiles/file/47101995108.pdfIn PDF document text
- http://chayka-svg.ru/files/97690685509.pdfIn PDF document text
- https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/6faf001c8da6e81d8d0ba664d8f409e9/ronazurexaxuwixebonixo.pdfIn PDF document text
- https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/a3f1a20317a654d10788dd8d38ce8265/12186496686.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_off0000e936.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE936	11196 bytes
SHA-256: `6e7129415c2809f35c55f96b8b94afd951fdc070551b5f1ea1ab7b2bd84d508a`
`font_01_sfnt_off00010367.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10367	16688 bytes
SHA-256: `96301f28552cfbf38662b7862a2802c70be9c05876f04915cf564cc2b387affa`
`font_02_sfnt_off00012eac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12EAC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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