PDF malware analysis — malicious · 285b5f3d2274ecc0

MALICIOUS

PDF

75.8 KB Created: 2021-03-24 13:40:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 4bc80daeb6a80e950e1f9f716974ffab SHA-1: ccc0bb79928a43e64212196a40e3f30aad1612bc SHA-256: 285b5f3d2274ecc0eecea1078111b5e78afd1dba658199756835600dc75fe150

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'SE_INVOICE_LURE' indicates the document attempts to impersonate an invoice or payment request to trick the user. The embedded URLs likely lead to further malicious content or exploit kits, consistent with a phishing campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9988

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
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://vilenefex.ru/strik?utm_term=sap+document+type+list+tcode PDF link annotation
- https://cdn.sqhk.co/zipirevofu/pwTkghT/11716300051.pdfIn PDF document text
- http://desajegurake.scienceontheweb.net/kifenalegibudasubuni.pdfIn PDF document text
- http://viteroludobano.mypressonline.com/64969154931.pdfIn PDF document text
- https://cdn.sqhk.co/josipinu/VFhia2J/xugikofizuzodi.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4417220/normal_5feb463d44faa.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4449392/normal_5fe7c63e71d45.pdfIn PDF document text
- http://wezotarekexu.22web.org/12509311554.pdfIn PDF document text
- https://cdn.sqhk.co/felolavap/fmGObcw/shudder_tv_guide.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4392861/normal_5fed95d16b142.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4383804/normal_5fdba1a2574c6.pdfIn PDF document text
- http://mebovaduzi.mywebcommunity.org/how_to_use_sports_hd_dv_sq11_mini_dv_camera.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4458833/normal_605ac082bbb2d.pdfIn PDF document text
- https://cdn.sqhk.co/dekawako/aICK7rk/zixifufip.pdfIn PDF document text
- http://xufededubumavif.scienceontheweb.net/garmin_gtn_750_installation_manual.pdfIn PDF document text
- http://dafagaketa.sportsontheweb.net/gumanuja.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4386330/normal_60484c5174ad5.pdfIn PDF document text
- http://gagivukamuw.getenjoyment.net/backbeat_fit_6100_wireless_bluetooth_headphones_sport_sweatproof_and_water-resistant_camo.pdfIn PDF document text
- http://tututot.mygamesonline.org/pazejanolalatevuwomadegak.pdfIn PDF document text
- https://cdn.sqhk.co/tuwesedujila/hbngjgj/8662905272.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://topagujowulefe.epizy.com/powerpoint_book_free_download.pdfIn PDF document text
- http://lijowavatajo.myartsonline.com/66396747665.pdfIn PDF document text
- http://mepoketefetur.rf.gd/57611554353.pdfIn PDF document text
- http://rabelinowizufe.myartsonline.com/autodesk_autocad_plant_3d_2020_tutorial.pdfIn PDF document text
- http://pojozija.onlinewebshop.net/17028921136.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000dcef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDCEF	5208 bytes
SHA-256: `1a27cd506501622dbd6d5de03c82e2d5d67a897faab7aa75cebfe924afba077f`
`font_01_sfnt_off0000ee92.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE92	10864 bytes
SHA-256: `28222259d48be56ac2c4368a66f36719e9e81f063fa541a0b452ae4b1c3e8eb1`
`font_02_sfnt_off000112e2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112E2	4324 bytes
SHA-256: `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`

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