PDF malware analysis — malicious · d1495d574e3ecc15

MALICIOUS

PDF

69.7 KB Created: 2021-09-26 01:26:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 114f998c4005b3a5ec25316ae2f05eb9 SHA-1: cb96e975347f204af22aaf5d0e3f359018e15e0a SHA-256: d1495d574e3ecc156e21dd42b623b577bc686f8d2690b58a19ab71b65ee19ca7

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. It contains numerous embedded URLs pointing to various domains, suggesting an attempt to redirect users to potentially malicious content or phishing sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates the document's structure is designed to host many links on disposable hosting, reinforcing the phishing or malware distribution intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9965

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
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=djpunjab+new+song+2019+mp3+download PDF link annotation
- https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce3cd6ee7a---93230595576.pdfIn PDF document text
- http://hunting.kg/userfiles/file/jiburasolenujosom.pdfIn PDF document text
- https://mobile-translator.eu/app/webroot/media/files/morufunimugatuwoxalem.pdfIn PDF document text
- http://kinel-hunter.ru/upfiles/file/laxakajuberifadag.pdfIn PDF document text
- http://gaongonmaiphuong.vn/webroot/img/files/92833834407.pdfIn PDF document text
- https://commonlawhouse.in/userfiles/file/49897478955.pdfIn PDF document text
- http://miyisz.com/mingyi/images/userfiles/file/ruwijalenajikudesesuram.pdfIn PDF document text
- http://elhammagazine.com/ckfinder/userfiles/files/6903927254.pdfIn PDF document text
- https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/9b5c9f61b79b7dcc4f88c0dc6fe2ce01/ragupufoxam.pdfIn PDF document text
- http://ain.proximeo.com/ckfinder/userfiles/files/wisividejapo.pdfIn PDF document text
- http://medicapoland.pl/uploaded/file/19473640725.pdfIn PDF document text
- https://ngusacdon.com/upload/files/xujupodanonigevuz.pdfIn PDF document text
- https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0413843af---60142075568.pdfIn PDF document text
- https://nirkongrp.com/ckfinder/userfiles/files/nozosegiwabifizosod.pdfIn PDF document text
- http://easyliveconstruction.com/ci/userfiles/files/4662997855.pdfIn PDF document text
- http://barexkft.hu/userfiles/file/rajotewalofagatuxaku.pdfIn PDF document text
- http://turchifiltri.com/userfiles/files/98375977083.pdfIn PDF document text
- https://khanoomhoteli.com/basefile/khanoomhotelicom/files/dafodumikositibokazulo.pdfIn PDF document text
- http://sapientgenerator.ru/files/userfiles/files/sadija.pdfIn PDF document text
- http://leguido.net/files/nafalolefozewusizo.pdfIn PDF document text
- http://awarelaxcentrum.cz/user_files/file/31517816475.pdfIn PDF document text
- https://babetravelling.com/ckfinder/userfiles2/files/mepimorin.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_off0000ada6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xADA6	15344 bytes
SHA-256: `3a18c3676d37bd120f569c74520980f9117993bcd134dfaa21e49151e7f3536d`
`font_01_sfnt_off0000d4cd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD4CD	11536 bytes
SHA-256: `734933f8465d6da34168b3d5497a356998c7643c8751eef0b3bc46503f651592`
`font_02_sfnt_off0000efde.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFDE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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