PDF malware analysis — malicious · c42f2b60a9f438a7

MALICIOUS

PDF

67.5 KB Created: 2021-09-26 09:16:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: e86f1c1b613e182910429c903023853e SHA-1: 216d7b82c9d80cbb7b1bb35cfbd91e8ca0f41dfd SHA-256: c42f2b60a9f438a779dac7dda66895f868adef25159462163e121b2cb66a03f8

134 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous external URIs, including one pointing to a suspicious domain ('garglob.ru') with a 'magic rampage mod apk' query parameter, suggests the document is designed to trick users into downloading further malicious content. The PDF's structure as a link farm on disposable hosting further supports a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9966

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
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://garglob.ru/uplcv?utm_term=magic+rampage+mod+apk PDF link annotation
- https://vntdc.com/upload/fck/file/42260152823.pdfIn PDF document text
- https://eqonetech.com/upload/userfiles/files/56151735078.pdfIn PDF document text
- http://sungwoneng.com/upfile_editor/2021/files/62453652852.pdfIn PDF document text
- http://franceplus.fr/userfiles/file/92274058733.pdfIn PDF document text
- https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/2t23f87vlth9i7fmp8lk5ba825/wagetaj.pdfIn PDF document text
- https://hunde-katzen.at/soubory/15368977026.pdfIn PDF document text
- https://peintures-descours.fr/fichier/files/55787263809.pdfIn PDF document text
- https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e78b265f0b---lejibe.pdfIn PDF document text
- http://adec-interiors.net/Uploads/file/63281460441.pdfIn PDF document text
- http://abwclayton.com/uploads/files/netuviwejebegifefidepasa.pdfIn PDF document text
- http://farashimirooz.com/files/2287113866.pdfIn PDF document text
- http://iscelenie.info/files/file/50907532009.pdfIn PDF document text
- https://greenvalleykerala.com/ckfinder/userfiles/files/pikukaf.pdfIn PDF document text
- https://booburger.myagenda.cz/pictures/editor/files/fivewolov.pdfIn PDF document text
- http://solarissoft.com/img/userfiles/files/12094449877.pdfIn PDF document text
- https://patriciogaete.com/upload/file/33873399679.pdfIn PDF document text
- http://hokkaido-love87.com/app/webroot/js/ckfinder/userfiles/files/93491391601.pdfIn PDF document text
- http://www.workbythai.com/admin/assets/images/fobolakagifekaxizupuz.pdfIn PDF document text
- http://ranchobg.com/img/file/9911767477.pdfIn PDF document text
- https://supermovi.com/userfiles/files/fekoduwaguvodi.pdfIn PDF document text
- https://adlinefor.com/home/webagen/public_html/korn/data/file/sujotilizirifud.pdfIn PDF document text
- http://nifaelectronics.com/userfiles/file/doxojuwodikul.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_off0000ac84.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAC84	14612 bytes
SHA-256: `361807b4b3da0645173a515efde21713affa7d2514a8131614a52b9d372b1355`
`font_01_sfnt_off0000d111.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD111	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000e928.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE928	10528 bytes
SHA-256: `284de91525c8904dcd34da61355c06ea1642c67f09e544f16fed4855f233962a`

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