PDF malware analysis — malicious · a2ffb84fc350255a

MALICIOUS

PDF

85.0 KB Created: 2021-07-14 00:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22

MD5: c43fe74877349d5470a9e9e2aae51ffb SHA-1: ce91fa5ad450c143a25a7ed006b427cf362d91e0 SHA-256: a2ffb84fc350255a998563522dc6ee116c2e6399419987aeb786da4b9d83949c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS platforms. These links likely lead to phishing sites or further malicious content, consistent with a credential harvesting or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://garglob.ru/uplcv?utm_term=how+to+deposit+a+check+not+in+your+name PDF link annotation
- http://geyikkimya.com/userfiles/upload/file/botedagekurawibagupalif.pdfIn PDF document text
- https://mednet.mk/public_html/upload/userfiles/file/risazokuruz.pdfIn PDF document text
- https://samarpanbharat.org/trila/userfiles/file/wewuvukumukeputaligute.pdfIn PDF document text
- http://ampletrekking.com/userfiles/file/bamaxagenufiwiginuwo.pdfIn PDF document text
- https://sibconsulting.com/contents//files/38527689744.pdfIn PDF document text
- https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6df835c241---84673350467.pdfIn PDF document text
- https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/8cab8728b33c86036ffcc6097edbc7a4/rivapamawaxotak.pdfIn PDF document text
- https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/9760b4531c087d081ebb8612edfe309f/didopi.pdfIn PDF document text
- http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a8838b7e55f---80677873063.pdfIn PDF document text
- http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcb370e5b3---rodunebegunut.pdfIn PDF document text
- https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/pc4v31f249olv62jae195r6shj/76130912110.pdfIn PDF document text
- http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16074dc2e8162c---69113871133.pdfIn PDF document text
- https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16084b8230c576---69450450877.pdfIn PDF document text
- https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/vlnnu8b0r59587no4j7ccirkh0/29585304918.pdfIn PDF document text
- http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa9fee11d0---jukezutemat.pdfIn PDF document text
- https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607adba0a5e46---42058579955.pdfIn PDF document text
- http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ca1ae97c4---wapuxo.pdfIn PDF document text
- https://nevisnews.com/userfiles/fojutodesadivebezataguzi.pdfIn PDF document text
- https://mobiligennari.com/userfiles/file/wanoxo.pdfIn PDF document text
- https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083876d87424---13104706888.pdfIn PDF document text
- https://weilaimachinery.com/userfiles/files/ludukumalojupefetepinujo.pdfIn PDF document text
- http://paoladebenedetti.eu/userfiles/files/18893658629.pdfIn PDF document text
- http://splogservice.ru/content/file/towaposunu.pdfIn PDF document text
- http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160bf081dc3105---gamugojenejuponigofam.pdfIn PDF document text
- https://abofahed.com/userfiles/file/metozekewuga.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_off0000e85c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE85C	17208 bytes
SHA-256: `e47008d1eb2b373bb9b06a45981e97a5c06169065aaf9cda02cc297ef038a8fe`
`font_01_sfnt_off000114b4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x114B4	11116 bytes
SHA-256: `bd5b9c0c940a3fc9e7951c39650ac0b214d1392e40a8920ce11351d0020f8305`
`font_02_sfnt_off00012e88.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12E88	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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