PDF malware analysis — malicious · 0760985a171d1cba

MALICIOUS

PDF

75.8 KB Created: 2021-10-08 06:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 902964f6222f7da73ccedbca8b456202 SHA-1: 071f66cb4a96842a4f02140b7a50302343bfd49b SHA-256: 0760985a171d1cba1a14d7aec5c137020ee35831d9386ac4311815d4239ebb38

176 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, some of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm or phishing attempt. The 'SE_CALLBACK_LURE' heuristic indicates the document prompts the user to call a phone number, a common tactic in callback phishing and tech-support scams. While no scripts were explicitly extracted, the presence of external links and the callback lure strongly suggest malicious intent, likely to trick users into revealing sensitive information or sending money.

Machine Learning

Nyx PDF Classifier malicious score 0.9908

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://crysiq.ru/uplcv?utm_term=biogas+plant+is+suitable+for PDF link annotation
- http://kolkandkolkdesign.com/site/data/ws/files/31056556430.pdfIn PDF document text
- https://tasleemdubai.com/userfiles/files/7020069645.pdfIn PDF document text
- http://africareview.in/userfiles/file/jurinidexuxokezudu.pdfIn PDF document text
- http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/f9vdf2k62navpf3676r7rb3on6/85486290456.pdfIn PDF document text
- http://fabtur.ru/upload/files/vorizagepiwajes.pdfIn PDF document text
- http://xn--o79av69abka850ab6c.com/upload/file/202109250036454453.pdfIn PDF document text
- https://beysukonaklari.com/ckfinder/userfiles/files/4744758821.pdfIn PDF document text
- https://europacreativaeuskadi.eu/files/galeria/files/wovisasis.pdfIn PDF document text
- http://prestopc.it/upload/file/49619857940.pdfIn PDF document text
- https://askisan.com/upload/ckfinder/files/xavobagopobubera.pdfIn PDF document text
- https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/sesudivedujaninepepaz.pdfIn PDF document text
- http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144b3041626d---dozofowa.pdfIn PDF document text
- http://321eastern-thailand.com/userfiles/files/muxiwekibepavepega.pdfIn PDF document text
- http://tartak-monis.pl/tartak/images/file/muzumi.pdfIn PDF document text
- https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef72855092---40016265030.pdfIn PDF document text
- http://hanstime.com/userData/board/file/25229794121.pdfIn PDF document text
- http://jayeonrak.com/upfile_editor/2021/files/finegedowadududes.pdfIn PDF document text
- http://quiltingacademy.net/fckeditor/userfiles/file/vametixiwigigofexefi.pdfIn PDF document text
- http://evo-models.com/uploads/userfiles/files/24744206542.pdfIn PDF document text
- https://termofriz.rs/files/6460827264.pdfIn PDF document text
- http://ohmamakitchen.com/uploads/files/jopiraso.pdfIn PDF document text
- http://paillasse.hu/userfiles/file/29635160077.pdfIn PDF document text
- http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613c4889c7d10---32330523427.pdfIn PDF document text
- https://indobaliart.com/sitefiles/file/soresuxigalulibitaziduzu.pdfIn PDF document text
- http://pretaporter-pegah.com/userfiles/file/18388046346.pdfIn PDF document text
- http://arcomproltd.com/userfiles/file/fasexim.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_off0000c3b7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC3B7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000dbce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBCE	10824 bytes
SHA-256: `c13a102ca95eaac81c56aad621c638468e511410a2aedf1d38672d3c25419b16`
`font_02_sfnt_off0000f4b8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4B8	17356 bytes
SHA-256: `cabd1ad7a951a05ca87a42814bcbda30b6d90cd25e6146a6967cf6ddf7e5ec4e`

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