PDF malware analysis — malicious · 697c3ef7ace52285

MALICIOUS

PDF

102.1 KB Created: 2021-09-07 19:09:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 35b9960db023938d0ad9b0598fcb1929 SHA-1: 4ee8e2fde3e34faff9ec5dd206f5c5aacb5ac601 SHA-256: 697c3ef7ace52285c8db554f68c5e4f5eeff47f72232a52ca1a068c67ef1147e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms pointing to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous URLs are consistent with a malicious document designed to lure users to external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9961

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=manual+dough+sheeter+tablo+bakery+machines+and+equipment PDF link annotation
- https://groupunsur2.com/contents//files/9869689781.pdfIn PDF document text
- http://intimatehotelpattaya.com/image/upload/File/83195898603.pdfIn PDF document text
- http://macautemple.com/userfiles/file/44370451659.pdfIn PDF document text
- https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607450ae00241---92416560168.pdfIn PDF document text
- https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee892d378eb---38028262884.pdfIn PDF document text
- https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/aea93213b7b75c6df5d23e0c994906cc/dijezu.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16129c59beb066---16818903347.pdfIn PDF document text
- http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716152e3263---poniwuledabujidajo.pdfIn PDF document text
- http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c928e6753db---69331277314.pdfIn PDF document text
- https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607c89223b3b0---61575794678.pdfIn PDF document text
- http://obchodsezlatem.cz/upload/files/9614433023.pdfIn PDF document text
- https://accesoriosalmayor.com/images/userfiles/file/movididazibusamomebu.pdfIn PDF document text
- http://15441707.com/data/board/file/20210807051410.pdfIn PDF document text
- http://cnex.cc/images/blog//file/duresuwuresajo.pdfIn PDF document text
- https://angelsforwarriors.org/userfiles/files/vixifukikobonived.pdfIn PDF document text
- https://nutricount.cz/UserFiles/File/72350325753.pdfIn PDF document text
- https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/4ce5195a52ef91a997ca3f482dbba416/41100704677.pdfIn PDF document text
- http://xtra360.net/campannas/file/volijixafi.pdfIn PDF document text
- https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/909dfd13bc85031960b287e2845c3fb3/6975802879.pdfIn PDF document text
- https://la-klamm.org/userfiles/file/vinuzetezukurugumumodosej.pdfIn PDF document text
- http://99hospitalitygroup.com/ckfinder/userfiles/files/gavasov.pdfIn PDF document text
- http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fb32ad9667d---75886951358.pdfIn PDF document text
- http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/21037708829.pdfIn PDF document text
- https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/206b9e5e5edbc164b699890d2b29e29f/46677347996.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_off00012826.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12826	11544 bytes
SHA-256: `56305277e281019076671d1f8bf835fd91b3e5cbcc177cea4f53736c7319a311`
`font_01_sfnt_off0001429c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1429C	18268 bytes
SHA-256: `7bad0b0e2a468e5c8e649005fb7e098808348f2d821883347b3ec1d93e0e3ff3`
`font_02_sfnt_off0001722e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1722E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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