PDF malware analysis — malicious · ecb3f3384a20af3f

MALICIOUS

PDF

78.5 KB Created: 2021-03-14 02:28:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: 3d6dd40817276d6ffd36c3c27f52e533 SHA-1: 9256cc0f4d63a40d8c9a21e8ece50203cdf204df SHA-256: ecb3f3384a20af3f4ee91a09a5963251fa456ab496008aedc558f47059f9c278

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an invoice-themed lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9954

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.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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://jumiwimov.ru/award?keyword=pdf+to+word+programmatically PDF link annotation
- http://keto-menu.online/otkup_katalizatora_katalog_sophie61s30.pdfIn PDF document text
- http://kowekigoduze.iblogger.org/resumen_del_capitulo_la_compuerta_numero_12_de_subterra.pdfIn PDF document text
- http://1ux.site/1084440971773epj.pdfIn PDF document text
- http://azalea.store/bhakti_gana_dj_2019yts3t.pdfIn PDF document text
- https://cdn.sqhk.co/sudagewas/iYg5aji/auditionsea_unable_to.pdfIn PDF document text
- http://ipai.online/hobart_am14_parts_ebayl1sds.pdfIn PDF document text
- http://cmbclientes.com/how_to_get_rid_of_medial_epicondylitisu6z2d.pdfIn PDF document text
- http://jezojarugeboz.22web.org/generate_barcode_in_itextsharp.pdfIn PDF document text
- https://cdn.sqhk.co/kululojilo/7TFtwkU/jesusoline.pdfIn PDF document text
- https://cdn.sqhk.co/tozerutiwezu/ji3hhuV/70071304561.pdfIn PDF document text
- https://cdn.sqhk.co/dewozoju/i3QFsku/noruwowodifamediwopira.pdfIn PDF document text
- https://cdn.sqhk.co/jigugabopu/jaiicQl/vazarewevo.pdfIn PDF document text
- http://dukovasupufe.iblogger.org/37690267111.pdfIn PDF document text
- https://cdn.sqhk.co/sogefuluf/lRfxjeC/our_solar_system_is_part_of_which_galaxy.pdfIn PDF document text
- https://cdn.sqhk.co/giripiponi/d7sgeha/sholawat_ghuroba_versi_alfina_nindiyani.pdfIn PDF document text
- https://cdn.sqhk.co/wemorapi/ihm81GC/whatsapp_sticker_maker_ios_iphone.pdfIn PDF document text
- https://cdn.sqhk.co/xeloxilava/jcVXvjd/54268818140.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://piludid.epizy.com/71052007176.pdfIn PDF document text
- http://jesitari.epizy.com/64073074106.pdfIn PDF document text
- https://s3.amazonaws.com/kujapomib/leaf_chloroform_extraction.pdfIn PDF document text
- http://puzegekizizovin.epizy.com/cursive_writing_file.pdfIn PDF document text
- http://vezexosewomex.epizy.com/windows_10_1809_creation_tool.pdfIn PDF document text
- https://s3.amazonaws.com/dusined/prepositions_of_place_exercises_for_beginners.pdfIn PDF document text
- http://tetirapop.epizy.com/google_chrome_for_pc_free.pdfIn PDF document text
- http://dosusixajamatef.rf.gd/xogiwoselusa.pdfIn PDF document text
- http://jopinewo.epizy.com/sijipipupumuporuzomu.pdfIn PDF document text
- https://s3.amazonaws.com/mufukep/85745916961.pdfIn PDF document text
- https://s3.amazonaws.com/kovezux/absolute_value_inequalities_exercises.pdfIn PDF document text
- https://s3.amazonaws.com/figidireki/sepufebivakifogemugimam.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f311.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF311	5492 bytes
SHA-256: `51af5677280dca0959f11807d497a880177f253db0cb581b2ba7d22ae7d9695b`
`font_01_sfnt_off000105cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105CC	10636 bytes
SHA-256: `d2bd3f0793d8ff0611d6267b7556821ac8a3a2da1783edd068b530f57284c013`

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