PDF malware analysis — malicious · 3e0c60f6b942a805

MALICIOUS

PDF

87.4 KB Created: 2021-07-03 10:32:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: ceeb52654fb3c6bea614f75f4017cfc3 SHA-1: 65899eada6eed9cebebae542cd1313856fd66661 SHA-256: 3e0c60f6b942a80537e5364975bb1844429747bec23efa1448016d540e000b55

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting it functions as a link farm for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/2fc6b8388377bb976d3f31c145616729/88586680133.pdf In PDF document text
- https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769b5eb927e---guwepop.pdfIn PDF document text
- http://superfishinglewood.com/uploads/files/gowafozi.pdfIn PDF document text
- https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/kvnpescgue1fgub0eu1kaf6mr2/xukisoxi.pdfIn PDF document text
- http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/ebu9qo572e9ourllijj25s5is4/natiwufosuledisupi.pdfIn PDF document text
- http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c65c619ddb---rogabufutisejepilinita.pdfIn PDF document text
- http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608c342c5965a---wejokoxoponiwofoj.pdfIn PDF document text
- https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/c15716f33d2bbe6433135acd19820c5c/43216169014.pdfIn PDF document text
- http://hersheyhigh1981.com/clients/37302/File/97898835873.pdfIn PDF document text
- http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160878eabdf064---gepijafewadovavinidena.pdfIn PDF document text
- https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/u41tl22rqi1dfe9qmjihulv0t3/nezulasafulepumidebo.pdfIn PDF document text
- https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/40299748753.pdfIn PDF document text
- https://gbagencement.fr/uploads/file/22562582944.pdfIn PDF document text
- http://modellszerviz.hu/userfiles/file/6492840579.pdfIn PDF document text
- https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6086510df---36383466357.pdfIn PDF document text
- http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e77726e381---jiliguwoxawavosabirisob.pdfIn PDF document text
- http://grawerlik.pl/userfiles/file/14606814051.pdfIn PDF document text
- http://www.kammerpop.de/files/file/segukorikawaba.pdfIn PDF document text
- http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/ed9980921311dd02349294e1bbc612d8/rurolebadedodilaxanifeza.pdfIn PDF document text
- https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/78qu8pp8fn66opu3gur7i2kqom/72550178974.pdfIn PDF document text
- http://allseasonsart.com/uploads/fck_uploads/file/tukevimafetakok.pdfIn PDF document text
- https://baohohoanglong.com/userfiles/file/jobine.pdfIn PDF document text
- https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4eb6c09066---98219895190.pdfIn PDF document text
- http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ab31f9c7f76---57668478312.pdfIn PDF document text
- https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/fhrrmnifoe557mvuo8p4pbuudv/lemafusakazava.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=i+feel+guilty+for+breaking+upPDF link annotation
- 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_off0000f233.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF233	17412 bytes
SHA-256: `828bd40f546496d0f0acad38fb317e24ba8ef71ec6a0f6acad83610172681f12`
`font_01_sfnt_off00011f83.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F83	10764 bytes
SHA-256: `52e82ef6ffa39e1abc60e7e842746881fddff060ae44343be41345d75de01eb1`
`font_02_sfnt_off00013835.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13835	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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