PDF malware analysis — malicious · 86f0dbb7e90ce627

MALICIOUS

PDF

83.9 KB Created: 2021-09-04 13:05:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 848dd555c64f7f8b0a25f421eb4184e7 SHA-1: b235851f8f0b947bea13debfe834e076e19f9f45 SHA-256: 86f0dbb7e90ce6274173db74001f38ec04d12fe020c01d1de7d754af07779d2d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier. Heuristics indicate it contains a link farm pointing to compromised WordPress upload directories, suggesting a phishing or redirection attempt. The document body is unreadable, but the presence of numerous external links on potentially compromised sites strongly suggests a malicious intent to lure users to external resources.

Machine Learning

Nyx PDF Classifier malicious score 0.9833

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 http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160744194ee19a---bakemodekafakorom.pdf In PDF document text
- https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/2co3ld29417hnj0c9v64l0fkff/dojasebepifaf.pdfIn PDF document text
- http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c59220e0c77---lonug.pdfIn PDF document text
- https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/babf7cf7531d7bd986efbf005e960624/gutetinoxow.pdfIn PDF document text
- http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607db8e939cae---94955082261.pdfIn PDF document text
- https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c139f877b1c---xuniwozuleriwajulipod.pdfIn PDF document text
- https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/a9716c6a713fca12e9be085a4c7e267f/bumuputidezerivuletifa.pdfIn PDF document text
- http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610a5dac5e2c2---51683235383.pdfIn PDF document text
- https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/fd639b967cb9399ecdb26309190c1481/libalerow.pdfIn PDF document text
- https://tvsporedi.si/vsebina/13757884280.pdfIn PDF document text
- https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/f90d4c2ae48ecea80e9aaef432dacb49/94858336425.pdfIn PDF document text
- http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba941860fa---22052708082.pdfIn PDF document text
- https://textolinguisticsolutions.com/upload/editor/file/gukimukux.pdfIn PDF document text
- https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/ddjsc1hvtafd5bl5llsappemso/soxogajosovofatunowev.pdfIn PDF document text
- https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/03f1dda874a13b20d920898b22ffdff6/88986620023.pdfIn PDF document text
- http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/befewelan.pdfIn PDF document text
- http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0676de7b3---53303478723.pdfIn PDF document text
- https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/1n5v1i1m4s0ngbg3blbs35g7ou/40303213752.pdfIn PDF document text
- https://byocamacho.com/ckfinder/userfiles/files/judomo.pdfIn PDF document text
- http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740e109434a---pepita.pdfIn PDF document text
- http://food-cloud.com/home/food-cloud/www/site//site/data/files/11379346410.pdfIn PDF document text
- https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/6ffef735b0128348b2f86124a7c2b30e/xegilawadifimagotumuxet.pdfIn PDF document text
- https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d63a7fa233d---fimibizad.pdfIn PDF document text
- http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/a85d54e794c84186544a33fa86d2c75b/18681242637.pdfIn PDF document text
- http://kovove-ploty-brany-zabradli.cz/UserFiles/File/kulusizudigekidebodi.pdfIn PDF document text
- https://angelsstaff.com/uploads/file/laginovapilabo.pdfIn PDF document text
- http://prabashproperties.com/ckfinder/userfiles/files/30572824205.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=cultura+do+abacate+pdfPDF 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_off0000de0e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE0E	10520 bytes
SHA-256: `1207c91fa5248993473da403d6f8a9ee6abaeb8783d1a030ac75d76a71a7e6d6`
`font_01_sfnt_off0000f5ed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5ED	20768 bytes
SHA-256: `858e92769badca617fe073d454f21c027590dac3dea4a3555e3e795e0bf19f23`
`font_02_sfnt_off00012a03.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12A03	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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