PDF malware analysis — malicious · b0bcd81e928652ef

MALICIOUS

PDF

85.6 KB Created: 2021-07-16 07:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 36c2807fddcc395de49446855d08a1d3 SHA-1: 156d69285155806bc6887477ad288a4c82f45456 SHA-256: b0bcd81e928652efabc6666dfc09cf04b3f30ffccbeb82db570f03c1da2e1a9b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to numerous compromised WordPress upload directories and other disposable hosting sites. The primary purpose appears to be directing users to malicious content hosted on these sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9922

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 http://timandlor.com/userfiles/file/mebuwakowibijipijoxorati.pdf In PDF document text
- https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/b1e723d1c73fc065332364b7a6314165/69844243913.pdfIn PDF document text
- http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160de6169595a9---3117482531.pdfIn PDF document text
- http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdb6b180ec---kuboxewusinosulelufajikin.pdfIn PDF document text
- https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941ec4715f0---kudobi.pdfIn PDF document text
- http://carroll1975.com/clients/4/4e/4e2b018d07aaa5a30c3e4fca1c7a8df7/File/fibiwodo.pdfIn PDF document text
- http://lhdrum.com/User_File/UpFile/file/20210704185516_dGVzYWt1dm9mZWppcnVuYXBvZw==.pdfIn PDF document text
- https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/073a39ca0c8669f4963fb88333a3e4d2/87404120399.pdfIn PDF document text
- http://sevoir.hu/uploads/file/54868863823.pdfIn PDF document text
- http://jumpinfit.it/userfiles/files/57115866734.pdfIn PDF document text
- http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160d06f71a9236---1933072808.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097e7406215c---lowizazusufojuzudediw.pdfIn PDF document text
- https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/9732f95a51661823cab615e148b4f543/jaruzoxanozubixojunuriko.pdfIn PDF document text
- https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/37aa15367d14248e05f157f927814ddb/mubifote.pdfIn PDF document text
- http://shqinze.net/admin/upimg/file///defeludegoxaviluju.pdfIn PDF document text
- http://jornalespacoaberto.com/app/webroot/datafiles/editor/files/xiwowizigijivokazabovo.pdfIn PDF document text
- http://exima.kr/userData/board/file/puzuwesawiriwosagetujiba.pdfIn PDF document text
- http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160ed2f302d745---bexujup.pdfIn PDF document text
- http://agnieszkapawlik.com/userfiles/file/48055264955.pdfIn PDF document text
- https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c072b158d---56983932673.pdfIn PDF document text
- https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/9e411dd45d1e8f3641eb16b9509830e0/50283588899.pdfIn PDF document text
- https://repare-ton-smartphone.com/userfiles/file/75688912774.pdfIn PDF document text
- http://tpdw.pl/userfiles/file/17211284301.pdfIn PDF document text
- https://fnb-concepts.com/images/uploads/files/64340996110.pdfIn PDF document text
- http://autovoda.ru/upload/files/wunuramawosegakipixovu.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=cow+costume+robloxPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d0b6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD0B6	10492 bytes
SHA-256: `e96986aa88ce960f6dd39d1b28c8e23e4a4904f9df91e0373c8bb7099cbb7df9`
`font_01_sfnt_off0000e8b8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8B8	17176 bytes
SHA-256: `6afe87a8e2250e67528c44215d3e4192950dd643c07a9693262ce34f2d417b0f`
`font_02_sfnt_off0001018c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1018C	17712 bytes
SHA-256: `33847885acdfb13ef93307a35106d7e8a4feaa13218a097afba4d9ca3c78d188`
`font_03_sfnt_off000130d8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x130D8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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