PDF malware analysis — malicious · 8e5fd69467c96adf

MALICIOUS

PDF

84.1 KB Created: 2021-06-26 07:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: a3b7d3c37398435c5bc6bcf991d65dba SHA-1: 4e7bf4b63ffe3600d0bd597bfcde1a91a9651e9d SHA-256: 8e5fd69467c96adf0fc5a7ebb820be756017740e77ac75e23df10ca884c86818

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF 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 compromised WordPress sites and potentially malicious domains. The embedded URLs, such as https://catamma.ru/uplcv?utm_term=am+in+love+with+a+coco+mp3+download, suggest a lure for phishing or malware downloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9833

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://catamma.ru/uplcv?utm_term=am+in+love+with+a+coco+mp3+download PDF link annotation
- https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0602b70f19---rifila.pdfIn PDF document text
- http://intrinhgia.com/admin/webroot/upload/image/files/sujivexasimuxupelol.pdfIn PDF document text
- https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/f6d021a6770a575b9a91bd5ad7f1e7be/lajovotutojalelimajefub.pdfIn PDF document text
- https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/e1f966ba9aec1b1e5380d5a6814ca2a0/govuwugori.pdfIn PDF document text
- http://ersatzmonitor.de/userfiles/file/73811711204.pdfIn PDF document text
- https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/on78fi4mi9heuk2k5qv478stlc/42271929370.pdfIn PDF document text
- http://workcoop.org/fckeditor/userimages/file/20210601151532.pdfIn PDF document text
- https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16079c19f323ed---78429518735.pdfIn PDF document text
- https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d02be1d57---fixusisofoku.pdfIn PDF document text
- http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/63605749814.pdfIn PDF document text
- https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/peodbo51ogaep0jjnru1ie1jca/8737873956.pdfIn PDF document text
- http://reicar.dk/userfiles/file/pulabuxaz.pdfIn PDF document text
- https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/859d5fe4caac9f1062458c55b02ccd9e/nibidesoxowis.pdfIn PDF document text
- http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16095ccbf6c77b---desejoloxemu.pdfIn PDF document text
- http://sjar-tech.com/uploadfile/file///2021060900310027.pdfIn PDF document text
- http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089bd8748461---setalorewepamet.pdfIn PDF document text
- https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d92059410b---felusaluzut.pdfIn PDF document text
- https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b5128ef14---naraguv.pdfIn PDF document text
- https://majorsagilekvaros.hu/uploads/file/2758234937.pdfIn PDF document text
- https://aawyx.com/sites/default/imageuser/file/gibeze.pdfIn PDF document text
- https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/eb590cf616f2fac2894416838ad965a6/guziviwawewajox.pdfIn PDF document text
- https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a4038fb17---xunirozusidoduzuvowivev.pdfIn PDF document text
- https://luminex.pl/upload/file/10747450427.pdfIn PDF document text
- http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/hjcuv4u4vk39iqpujd4o8f0jq3/muxopatanuwe.pdfIn PDF document text
- https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16097297f4b093---sajajobepelelanarig.pdfIn PDF document text
- http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16086ae39e3f0c---10094542000.pdfIn PDF document text
- https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/1c4e05de670d7e8f1e08008167130da9/29545363442.pdfIn PDF document text
- https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/gnbpuqhem06gh12srn38falos0/kaliso.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_off0000e567.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE567	10816 bytes
SHA-256: `9f736245f93fc4b1e4865ecd1d6284c633a528835c08ed5445a8203423eb9f02`
`font_01_sfnt_off0000fe2e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE2E	17504 bytes
SHA-256: `67618713803be8a975992bca882c13360c5067db9bb9d78b71e43f8eb07f8179`
`font_02_sfnt_off00012ada.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12ADA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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