PDF malware analysis — malicious · 9bfa8619140ad4a7

MALICIOUS

PDF

84.3 KB Created: 2021-09-06 06:09:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: d8d0f153147a5276d489685fb331f75c SHA-1: ff41e771ce9ffdfd5cef8f89b28bcfa1519fe39b SHA-256: 9bfa8619140ad4a75b420c089e3d2dbf2eff7029c67c56ca0bb45b24d77964aa

176 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The heuristic 'SE_CALLBACK_LURE' indicates the document may be designed to trick users into calling a fraudulent support number, further supporting a phishing or scam-based attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

Heuristics 7

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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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=policy+process+pdf PDF link annotation
- http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160768f4e28846---62214880422.pdfIn PDF document text
- http://barcelonasixtytwo.com/userfiles/file/xegavisafulijugiwulitiso.pdfIn PDF document text
- http://ibarugi.com/fckeditor/userfiles/file/debofoduxovidovozijiveser.pdfIn PDF document text
- http://hometextiles-consultant.com/ckfinder/userfiles/files/95296353373.pdfIn PDF document text
- https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/2a1e90cc6bb555ec6d4ddb5166379946/9988110269.pdfIn PDF document text
- http://psychologyforeverybody.com/ckfinder/userfiles/files/63187847438.pdfIn PDF document text
- http://venusland.vn/app/webroot/img/files/gaputil.pdfIn PDF document text
- http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/8mbg6qk3sqf0mqqjmmcj5uucb7/47910436954.pdfIn PDF document text
- http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b9c3e6236---75700643805.pdfIn PDF document text
- https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16093fbe7b0e12---50639904134.pdfIn PDF document text
- https://ddshower.com/ckfinder/userfiles/files/51604153910.pdfIn PDF document text
- http://kag.fr/userfiles/file/37439201570.pdfIn PDF document text
- http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b76252947bb---puzokasidopuvabarul.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ba0bd4ef2---53217478493.pdfIn PDF document text
- https://vnjhanoi.com/upload/files/22068704690.pdfIn PDF document text
- https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5c07d9561---70404977517.pdfIn PDF document text
- http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/78756597985.pdfIn PDF document text
- https://goodline.by/userfiles/file/fubagu.pdfIn PDF document text
- http://stin-verdon.fr/assets/Image//files/1232573723.pdfIn PDF document text
- https://dusunceokulu.net/resimler/files/30338247419.pdfIn PDF document text
- https://2acontractor.it/images/file/mibajetoxenuperawozasiz.pdfIn PDF document text
- http://canvangdientu.com/images/file/11333253207.pdfIn PDF document text
- https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/gbfutbr72ik1ntnm4glhb5ghib/dipemoxu.pdfIn PDF document text
- http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613562bd762a4---gedinoponuxiropi.pdfIn PDF document text
- http://lbhodgereunion.com/clients/3/38/38e1f81cb1ac74d12d86c8ba87866b9f/File/jopubeku.pdfIn PDF document text
- http://bmcnx.com/userfiles/file/wufezaditorubezozeneb.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_off0000e55d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE55D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fd74.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD74	10364 bytes
SHA-256: `057b9684baa99e2e9e99307fc71cf26fb9d0c8f2fa453ee0e53903b121cd00fb`
`font_02_sfnt_off000114f1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x114F1	17876 bytes
SHA-256: `72c6d13a9550c52e57b22de232b15d6b972408bf529e95018fc97116607c0bec`

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