PDF malware analysis — malicious · a24408b2c50aa9ec

MALICIOUS

PDF

88.8 KB Created: 2021-07-17 21:48:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: cdf62f6bb1672d64a432d130882ac28f SHA-1: ab02d58e260606c21d9c333114f3224df280c27d SHA-256: a24408b2c50aa9ec619d21d3c73efd456ce1cc6dd618dcfc6f67d07c8450a571

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be hosted on compromised WordPress installations. The presence of these links suggests an intent to lure users to malicious sites for phishing or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://glbtrader.com/userfiles/file/81253044594.pdf In PDF document text
- https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/f129e27abd079c18ba41b53ad63917ee/93993455150.pdfIn PDF document text
- http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9c79c267b---kezofug.pdfIn PDF document text
- https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160747dc8dabfb---vefijidix.pdfIn PDF document text
- http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3de1494351---13194318359.pdfIn PDF document text
- https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607a550a35f18---15377655283.pdfIn PDF document text
- https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721e22e473a---70562816296.pdfIn PDF document text
- http://vdtonline.vn/static/uploads/editor/files/83490493397.pdfIn PDF document text
- http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe29506749---1186691075.pdfIn PDF document text
- https://psychologgia.pl/Upload/file/jitexipu.pdfIn PDF document text
- http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/160742e476d05f---zuzos.pdfIn PDF document text
- https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/q1cjeltchii9jgvd5raos5dqv6/zozulexukojofimaredis.pdfIn PDF document text
- https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/3r5voma3c50sd6n4j2o261rmq5/19581473001.pdfIn PDF document text
- https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e904cebe7bf---zogomemukepata.pdfIn PDF document text
- http://111-orte.de/testarea/cwsCMSlight/media/files/67608463234.pdfIn PDF document text
- https://cupanghitam.com/contents//files/82741462584.pdfIn PDF document text
- http://inimtrento.it/userfiles/files/5002331982.pdfIn PDF document text
- http://soflacops.com/clients/83266/File/besavagemasuto.pdfIn PDF document text
- https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/qlvnlfniicjpv57donpmcn7u10/sobarunaxof.pdfIn PDF document text
- https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/bf1e616ea30570d2b37730ba893221f7/36674958761.pdfIn PDF document text
- http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16093f912e1c5d---89059126825.pdfIn PDF document text
- https://asiarsolutions.com/userfiles/file/nimagerijumenesifejim.pdfIn PDF document text
- http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/khhbfeid77tr0j1ted84tl2n17/xezimadofaxewugufow.pdfIn PDF document text
- http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/f0b1b542930e388b3b34e7c62fc2d365/8682316284.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=tax+for+single+person+2021PDF 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_off0000f54d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF54D	18216 bytes
SHA-256: `3497c0185e9a3400edc9d11ae33fa9aa8ac87ce418fe93b1ced19d5dd76a4a7a`
`font_01_sfnt_off000124d0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x124D0	10796 bytes
SHA-256: `24c9692b5d1cf6a739f45bf79d22e7edd23415cd9f9b5c5cedec48cc931e7dd8`
`font_02_sfnt_off00013de4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13DE4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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