PDF malware analysis — malicious · 4d474eb1978ecfb8

MALICIOUS

PDF

84.8 KB Created: 2021-07-14 02:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: cca34b9b9efa6a478ef132e33e171cff SHA-1: ab03e67336fa38d86343ce96d658aeed5f34cf58 SHA-256: 4d474eb1978ecfb8baf3ff7e9f2ba58bd11222d33951201beddcfb2e8fcdc863

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, indicating it likely serves as a phishing or malware distribution vector. The document functions as a link farm, directing users to numerous external URLs, some of which are hosted on compromised WordPress sites, increasing the risk of users being led to malicious content or further exploitation. No scripts were extracted, but the presence of multiple external links suggests a phishing or credential harvesting attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9860

Heuristics 6

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.
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://konemara.hu/userfiles/file/60097466357.pdf In PDF document text
- http://www.shadowrangers.live/img/files/659366050.pdfIn PDF document text
- http://smeclassof1987reunion.com/clients/37165/File/86899576247.pdfIn PDF document text
- http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/5cfb1d660d8a9c8c826fdd58f4031ecc/ruvaxekazejepajevoduk.pdfIn PDF document text
- http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6328620ae4---buvorapizoxukigumufasedo.pdfIn PDF document text
- https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/7cc4c6fce223c48d27bf53ab185a9078/75845102913.pdfIn PDF document text
- https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/3c7ed92b65226bc25cd4127d8e68aab8/bilalalisaxiravatiwube.pdfIn PDF document text
- http://xn--80aamdqpfpr.xn--p1ai/upload_picture/bizitinojo.pdfIn PDF document text
- https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/mkkmblrulq0sfrb6jdq67msidm/pedavatojaluponeji.pdfIn PDF document text
- https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607055d76f4c8---sugunilu.pdfIn PDF document text
- http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbd1747a36e---66721590786.pdfIn PDF document text
- http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e68b554473a---masunita.pdfIn PDF document text
- https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/95ad9fe51c1ea77c1c3f020d4dee3f7a/16898555683.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160778501b0be7---48727835828.pdfIn PDF document text
- http://sns.hu/_user/file/17301175558.pdfIn PDF document text
- https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/432523450a2e6376958fd214346fa433/jorekud.pdfIn PDF document text
- https://thegioidongphuc.net/ckfinder/userfiles/files/tixosameduv.pdfIn PDF document text
- http://beerskiboot.com/img/upload/file/2597296556.pdfIn PDF document text
- http://fenotropil.ru/userfiles/file/mewarofuwagubirix.pdfIn PDF document text
- https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/cddd6925f52728177cce9283eb942a7b/kinifivofepatajotalaz.pdfIn PDF document text
- http://amadpich.com/userfiles/file/tebipikotugovi.pdfIn PDF document text
- http://maasmartcity.com/userfiles/file/givokanepasusizijititidin.pdfIn PDF document text
- http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db495a8d8b---gazonemu.pdfIn PDF document text
- https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/lrdqch3emcjalqf13b337oi7ub/89577649057.pdfIn PDF document text
- https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/8538e3fe1a8412039a88319f0c5c6e33/7003083923.pdfIn PDF document text
- https://boumqueur-edition.com/upload/fckeditor/file/56874574769.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=consonance+in+the+bellsPDF 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_off0000e993.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE993	10400 bytes
SHA-256: `a184f8d6813970b41a90bf6c649850abf9504fb55542b89143703b8f9626c2f8`
`font_01_sfnt_off00010117.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10117	16564 bytes
SHA-256: `7f2cff9aa7ccc8423f1cc9964ecc767ed2a80416753acac7b36f30ef4c5f8c73`
`font_02_sfnt_off00012bfa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12BFA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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