PDF malware analysis — malicious · 12368468600eb552

MALICIOUS

PDF

85.4 KB Created: 2021-09-01 06:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 3d79b10b1f8995852243674aeb01abee SHA-1: 8e64956e1dffafa1d793266a302f895c86f667b6 SHA-256: 12368468600eb55298bd12d9b46100f5de38b6ab9a2cbf79abb1e49c42a56734

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external URIs and is identified as a link farm, with many links pointing to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable, but the URL patterns are sufficient to infer a malicious link-farming attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9919

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://oniceh.ru/uplcv?utm_term=transferable+skills+in+a+sentence PDF link annotation
- http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5f390b8e22---rolejojedotitidegelob.pdfIn PDF document text
- http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/161212f71c02bb---38991745132.pdfIn PDF document text
- https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/5q7m293o9nke2qaqoaf5bap6bj/8564193181.pdfIn PDF document text
- http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608a044611741---98981790762.pdfIn PDF document text
- https://aecvfcom.nrgence.com/upload/userfiles/files/66480402387.pdfIn PDF document text
- https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/c77d66d48d2ddc331d2923583634443b/744042113.pdfIn PDF document text
- https://khanikango.in/file/wikovo.pdfIn PDF document text
- http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48637acea9---tufefiwetipuxirisudidanaw.pdfIn PDF document text
- https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/fc18e6d30287d560ccc550c234f0551e/70590778507.pdfIn PDF document text
- http://alimentosldm.com/userfiles/file/wixoru.pdfIn PDF document text
- http://bsl-trans.ru/admin/ckfinder/userfiles/files/32267972133.pdfIn PDF document text
- https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/da25a5f6b8e35d9c233d97b7c231785a/27247917549.pdfIn PDF document text
- http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/49286293485.pdfIn PDF document text
- https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/19cdcf1fd7ad863a62feaa0e75dac3b6/63517049212.pdfIn PDF document text
- https://baxsporthorses.com/userfiles/file/pujijobebifofujamaretulag.pdfIn PDF document text
- https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16119f46f32793---74382260441.pdfIn PDF document text
- http://carsonpokebar.com/uploads/files/7082332500.pdfIn PDF document text
- https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da61dba6f6---jomavodopotazozazemilazol.pdfIn PDF document text
- https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16077b2a9b7016---48695462780.pdfIn PDF document text
- http://dalnoboy.org/data/filestorage/upload/files/940726768.pdfIn PDF document text
- http://i-dron.cz/data/file/koguvamu.pdfIn PDF document text
- https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b097ebeb10---55183346642.pdfIn PDF document text
- https://ecoretras.com/file/78999911709.pdfIn PDF document text
- http://saraya-shop.ru/upload/files/89472295559.pdfIn PDF document text
- https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/o4hsoelg1dnn3n8e6pt5lkuam5/raxinapuwo.pdfIn PDF document text
- https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/a35c2c14d939b86638826aa1522d6eea/keduxiliranakudaw.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_off0000e5a2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5A2	18704 bytes
SHA-256: `fd9417a64bf23acdd9a1dfd4402078b85795c8218b6a726e9a697ec6e361fca8`
`font_01_sfnt_off00011560.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11560	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012d77.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12D77	10404 bytes
SHA-256: `b442bc959744924c4d232368bf96230b7a0434ae4fcaaf01c9d76e6334dd9c8e`

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