PDF malware analysis — malicious · bea8fc045caa307b

MALICIOUS

PDF

90.6 KB Created: 2021-07-02 20:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 7d4d7424db0e45ef17497fea49e2c283 SHA-1: 2b42ab13bcf45e4389db965da6c8bf8a0efe7f81 SHA-256: bea8fc045caa307bec36fe3cafa87a0ea31d5bec44e08afbbbc100553f3a1a02

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute malicious content. The presence of a 'download' button lure further supports a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

Heuristics 7

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/96ce70cbd477798c63da46d18aa19acb/lufizuwemigenixow.pdf In PDF document text
- http://goref.ru/files/file/18021464847.pdfIn PDF document text
- http://sewakendragroup.com/userfiles/file/9286161023.pdfIn PDF document text
- http://ouhkpthaa.org/userfiles/rurepadiseleli.pdfIn PDF document text
- https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084cd663e43f---gimolenoxaxipani.pdfIn PDF document text
- http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a91ac874c09---54644705050.pdfIn PDF document text
- https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/21t261hqiu0jamfcmv6qqg1ki8/tebagapukejiwute.pdfIn PDF document text
- https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/9bcafa1a97c4985e0dd7a5356dd910a6/sonexotu.pdfIn PDF document text
- https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/6urcms2mbkr12br7hnrfptoaov/fuvederebufu.pdfIn PDF document text
- https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/457742386f57c0873d73fd4802d1e973/30869969871.pdfIn PDF document text
- https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/fcf6bc1899d4f8548738079c683d252f/vogiripejixigojojojawib.pdfIn PDF document text
- https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/007904925c390971c4947e2afdc3e593/jivile.pdfIn PDF document text
- http://alexlunacoach.com/img/editor/file/4310302817.pdfIn PDF document text
- https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0f4e6161dd2eb4537f6038fb2c17415b/19994168210.pdfIn PDF document text
- http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c84c7013fea---1814249427.pdfIn PDF document text
- http://drapikowski.pl/uploaded/fck_files/file/bonenuxuzotaloxomibad.pdfIn PDF document text
- https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/jch9aadh7u406eeh4thj4dtpc9/31384899604.pdfIn PDF document text
- https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3a8ac4b9a---16591170121.pdfIn PDF document text
- http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079f9fe904e7---bufenijaferazelinufov.pdfIn PDF document text
- https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a98db38e76---kosemavuxevo.pdfIn PDF document text
- http://aivieksteslaivas.lv/userfiles/file/nabomaj.pdfIn PDF document text
- http://tragadsonisurat.com/ckfinder/userfiles/files/lemesefejupevomefepa.pdfIn PDF document text
- http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16098b37a7ce82---49197769993.pdfIn PDF document text
- https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/7cfde06ab2bd774571ca1ef1b59abc5c/23320874437.pdfIn PDF document text
- http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7958c15cf---69903113692.pdfIn PDF document text
- https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098cbf8e2023---dovujaj.pdfIn PDF document text
- https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/f78c42f0ef8c432f075c2697007ba042/xatikijukagufonalitokos.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=conjuring+2+movie+download+in+tamilPDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fee5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEE5	16988 bytes
SHA-256: `67870c5f86c152146f382ba865906703816c50006209b21754dac678b3b4d68b`
`font_01_sfnt_off00012b2d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B2D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00014344.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14344	10956 bytes
SHA-256: `80756462a2d22bd7f6cb26e1f1ed5a43ff25da97a305ea525e4a5e27b3eff41e`

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