PDF malware analysis — malicious · 0eb215058455cafb

MALICIOUS

PDF

116.9 KB Created: 2021-09-02 05:32:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 932cad00d68f477d997eef5f7f7281b6 SHA-1: 23eb9c16a62bbe74cb9a46c673eb01cb583b3539 SHA-256: 0eb215058455cafb73fd19ea016708162f79573a5b760431ad90bdcbf0012db8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or link farms, indicating a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a common phishing lure, likely intended to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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 https://krisoc.ru/uplcv?utm_term=world+largest+coal+producer+country PDF link annotation
- https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/khct8vchgnacjvqmohhc8jqbts/jomufebol.pdfIn PDF document text
- http://kozelskadm.ru/files/uploads/files/12576304539.pdfIn PDF document text
- http://avtokapriz42.ru/userfiles/file/5296478387.pdfIn PDF document text
- http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609a79c9a2053---27379814330.pdfIn PDF document text
- https://aparcaderoshaddaichile.cl/uploads/images/files/zokubajegaragawejojupax.pdfIn PDF document text
- https://aslimitada.com/userfiles/file/93507255405.pdfIn PDF document text
- http://www.neoneofitou.com/ckfinder/userfiles/files/zemuxegijiwulekotunu.pdfIn PDF document text
- https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/828a9d607ee512daafa834bde7fd928f/8957707866.pdfIn PDF document text
- http://www.solarwindependence.com/ckfinder/userfiles/files/lejazewusanifena.pdfIn PDF document text
- http://onlytech-tunisie.com/userfiles/file/dopadan.pdfIn PDF document text
- https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/266b782768f696565ef18a83cdde2f12/18348614663.pdfIn PDF document text
- https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c6be8d88026---lubopa.pdfIn PDF document text
- http://arisutour.com/ckupload/files/38318596155.pdfIn PDF document text
- http://stin-verdon.fr/assets/Image/files/44013963891.pdfIn PDF document text
- https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/4aa2cf6d797b25992311b85e8ce0ffe3/16196135000.pdfIn PDF document text
- http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160846cba70309---58771782222.pdfIn PDF document text
- https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/0qjaf8c0uf5orto7fttsffu2b2/66790799828.pdfIn PDF document text
- http://talk200.com/admin/admin/uploadfiles/file/65630753407.pdfIn PDF document text
- http://gattoneva.pl/pages/userfiles/file/20420426183.pdfIn PDF document text
- https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/4db557f89a11bb608652550a2850ba0e/50085799297.pdfIn PDF document text
- http://brenna-ski.pl/userfiles/file/3253071101.pdfIn PDF document text
- https://dcmheavyequipment.com/admin/images/file/25156570403.pdfIn PDF document text
- http://highendschmiede.de/highendfiles/file/nosusovulikuvoxusatinumu.pdfIn PDF document text
- http://a-pluset.com/userfiles/42507337166.pdfIn PDF document text
- https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/8e1134173c20f856c180309646a1df17/29131895995.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_off000164b1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x164B1	10804 bytes
SHA-256: `59d7f733ad9bcc444d033b0687d721886ea4f6eb40c1e99d1f8251bf5dcedbee`
`font_01_sfnt_off00017d94.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17D94	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000195a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x195A6	18544 bytes
SHA-256: `e516dd8fa03dac31afb01239a62bf0aa336722e05dc4642adbd14c29ed309664`

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