PDF malware analysis — malicious · d60dc2108f1d1e41

MALICIOUS

PDF

89.5 KB Created: 2021-08-01 22:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: baa8c27f7e89326ebd83b9720b312a2c SHA-1: 0ab0c08a170f79c1aa66062dc61b1625af171458 SHA-256: d60dc2108f1d1e41e643eceac3d6a947cbd1d033a90af303d4dc137148103487

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. It contains a link farm pointing to multiple compromised WordPress upload directories and other domains, suggesting it's used to distribute malicious content or phish users. The presence of external URIs and the nature of the links strongly suggest a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9875

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 http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff32e56b5a---sapizuxoxitedegariwogik.pdf In PDF document text
- https://china-glass-mosaic.com/userfiles/files/20210621_034323.pdfIn PDF document text
- https://rcot.org/userfiles/file/31919845110.pdfIn PDF document text
- https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/088e8465a5464ce5847a3d4cb34c6f52/forasodevibiba.pdfIn PDF document text
- https://novzelandiya.ru/ckfinder/userfiles/files/63651295143.pdfIn PDF document text
- https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/64f88937d89d03b2e63a114838635ad8/tikekabidoxavafusifi.pdfIn PDF document text
- http://www.vikingmaterials.com/img/zudedemarigepe.pdfIn PDF document text
- https://akapacha.com/userfiles/file/4994507440.pdfIn PDF document text
- https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/t6a5bqree51rakmplvi2b5ljo5/rorivoxe.pdfIn PDF document text
- https://accuratesearch.com/userfiles/file/vuvuxavidedil.pdfIn PDF document text
- http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a68750c6e0f---3369753153.pdfIn PDF document text
- http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a31e505d76b---mukukul.pdfIn PDF document text
- http://vogiantinhmach.com/media/ftp/file/xikigogapagifezonojojon.pdfIn PDF document text
- http://woods-china.cn/ci2/userfiles/files/20210617052515.pdfIn PDF document text
- http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c87c90272e---mipurotujivitiguvetiraje.pdfIn PDF document text
- http://jjmcp.jp/userfiles/Image/file/gekijulowugamenizeni.pdfIn PDF document text
- http://karat-dobremiasto.pl/userfiles/file/kosodu.pdfIn PDF document text
- https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/etprbrt4ce417rkje9dgja0q11/70410541600.pdfIn PDF document text
- http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16102f4c04f6b5---98552217454.pdfIn PDF document text
- http://stlukesfp.org/ckfinder/userfiles/files/timaxef.pdfIn PDF document text
- https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16097814487908---38045148926.pdfIn PDF document text
- http://dyglas.com/userData/board/file/wivobeluv.pdfIn PDF document text
- http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/k82r5k8goq0tlkccm3783e6nd2/67343119034.pdfIn PDF document text
- http://mictrogiang.com/userfiles/files/26440131481.pdfIn PDF document text
- https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/6ed40fd9e1aff3f6bd2e6d62b855b1be/nirujojubuwevewupen.pdfIn PDF document text
- http://danielbushreunion.com/clients/41596/File/80202371662.pdfIn PDF document text
- http://budohurtsa.pl/userfiles/file/35088845044.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=picsart+pro+mod+apk+free+downloadPDF 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_off0000f6cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6CF	17020 bytes
SHA-256: `98ee5b3c684b2c76db10a3ee5a22084da82acf91d56b395df851c69e3fad7abf`
`font_01_sfnt_off0001236d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1236D	10960 bytes
SHA-256: `64d9c9335dcabeb5aaf5685004aae27c307c08de8d869d5c5da0ea70f9994852`
`font_02_sfnt_off00013cf3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13CF3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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