PDF malware analysis — malicious · 06d6ea3937c257e1

MALICIOUS

PDF

87.0 KB Created: 2021-07-15 12:15:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: f6a102316c34c3a06bc9c9a375b6fd6c SHA-1: d9b6ab7ddb795e88d8ea01a5568215e9c9b78461 SHA-256: 06d6ea3937c257e1fee4a4b507bf4374401fdb136a20e2fdd837a6baaa28dc0c

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 a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs that point to external websites, likely to lure users into downloading further malicious content or submitting sensitive information. The presence of multiple compromised CMS upload links suggests a tactic to host malicious files on seemingly legitimate but compromised infrastructure.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://infrive.ru/uplcv?utm_term=henry+stickman+games+infiltrating+the+airship PDF link annotation
- http://digemnd.com/UserFiles/file/semabekitefinifitupo.pdfIn PDF document text
- https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/97a31934f04af1d8f5c4b14a830936e0/fabut.pdfIn PDF document text
- http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609086c714505---53600994017.pdfIn PDF document text
- https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/41ff5e836f53c2539e796cbfe26f1f6e/60054382110.pdfIn PDF document text
- https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160898f665d7a8---vobamomusujawajibaw.pdfIn PDF document text
- http://narcisse.sk/editor_uploads/files/16987894678.pdfIn PDF document text
- https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/8a3e2caba3d93519b801189965cba118/87833833919.pdfIn PDF document text
- http://sam-global.info/files/file/25724953369.pdfIn PDF document text
- https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736b223eda2---39925339944.pdfIn PDF document text
- https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160a633b60cebe---toxudo.pdfIn PDF document text
- https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160890d29dba41---21663061234.pdfIn PDF document text
- http://nhahanghienminh68.com/upload/files/wezuvavetulutati.pdfIn PDF document text
- http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e4da98f68---beginiz.pdfIn PDF document text
- http://theemasternetworker.com/ckfinder/userfiles/files/33472745554.pdfIn PDF document text
- https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/39a24223e0921250ce30d9fdfb039f0e/lizefuxegakafaregi.pdfIn PDF document text
- https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/68a563ade854bf45ff038b0a5facfc00/21174107049.pdfIn PDF document text
- http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c13030b50---wurazeruz.pdfIn PDF document text
- https://artofsurfing.com/preview/ckfinder/userfiles/files/10932790470.pdfIn PDF document text
- https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/42386a6e1b46c9b4503238fd537a8ddd/pijemesitoxo.pdfIn PDF document text
- https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7a918c9e5---83576377605.pdfIn PDF document text
- https://sieuviet.net/webroot/img/files/85591954298.pdfIn PDF document text
- http://timavoshipsupply.it/userfiles/file/vajilatekufuvobegoj.pdfIn PDF document text
- http://nuestratierrapremios.com/campannas/file/zetagipalozunufagosot.pdfIn PDF document text
- http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a151cd5acb2---jalos.pdfIn PDF document text
- http://e1pl2.nazwa.pl/busy/fotki/file/29350041222.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_off0000ee54.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE54	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001066b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1066B	11004 bytes
SHA-256: `24818b693f7900636aabcc470968d201bd233bfe26fcba6fd0309dacf23ef95b`
`font_02_sfnt_off00011fcd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11FCD	17972 bytes
SHA-256: `7f4c7482a7254a7146c9b2b381b5912a506356def45d763f6f86c3ddf86ff66d`

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