Malicious PDF — malware analysis report

Static analysis result for SHA-256 572991e7930363d5…

MALICIOUS

PDF

89.4 KB Created: 2021-05-05 17:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b1daf5fdd36c223aee0476bca05fc2bd SHA-1: 4193958dab158a27e08b43e30210de8caf93bf41 SHA-256: 572991e7930363d511e71f12397b6c4c666ebcf940503e4b2debb062ec02f705
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm or SEO spam operation. The presence of a URL with 'utm_term=is+lg+stylo+4+a+good+phone' suggests a lure to a potentially malicious or deceptive website. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/strik?utm_term=is+lg+stylo+4+a+good+phone PDF link annotation
    • https://cdn.sqhk.co/gabadifofibo/hihcjcQ/feisty_pets_guinea_pig.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/1IYBjfH/fuvoxisu.pdfIn PDF document text
    • https://fowinojosusine.weebly.com/uploads/1/3/4/4/134495991/lepexete-pufirimutoza-rawovozikipuze-gupege.pdfIn PDF document text
    • https://cdn.sqhk.co/nivazesoj/4EFdggV/13626748063.pdfIn PDF document text
    • https://cdn.sqhk.co/sazobenapur/jfViiiI/13566806075.pdfIn PDF document text
    • http://xumukekuvag.22web.org/a_practical_english_grammar_exercises_1_chomikuj.pdfIn PDF document text
    • https://dagakaxogofawi.weebly.com/uploads/1/3/4/6/134699425/poxoduze.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/the_mandalorian_cast_and_character_names.pdfIn PDF document text
    • http://pupunorip.getenjoyment.net/sidefadawaxiwipimadal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b2acb8e-5380-4209-ae5e-1205d5f042aa/fedex_tracking_id_says_master.pdfIn PDF document text
    • http://laletanegimiw.epizy.com/mopawamabotumokupaxagoto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be37b3ea-e66b-42c0-9928-53df25dc2a4a/84264608768.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d09b9506-9b5c-4cfa-ae11-ca19365ef876/narebezufemojalel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df792661-41a2-4f3a-b534-e33475d9cbae/best_nigeria_worship_songs_2020_mp3_download.pdfIn PDF document text
    • http://tipatanakuke.onlinewebshop.net/doravavofavupetara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e6e971f-7934-4bea-b32b-69d92bf99d70/lotobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6cdd30c-cc05-4442-b119-1d15a93cfe0d/mumoxole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a921137e-910f-4b15-94e5-e32422e16cd7/34672946389.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36bff3a0-acfb-4fe0-8f96-4e763ec71fec/kenneth_cole_watch_straps_online_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0923db23-1227-4107-81d7-7e78fb3200d4/bilasepiwosidisixiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e42feb3d-49b3-4071-a3f1-b7def64897dc/forged_in_battle_ratte.pdfIn PDF document text
    • http://dijuvunote.onlinewebshop.net/zenujuxegatupam.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
    • 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.

FilenameKindSourceSize
font_00_sfnt_off000107cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CF 5252 bytes
SHA-256: 8df66c988fc667e3d4275381d0bf69b00c33903e444d3b9df642b6f9f7a76c82
font_01_sfnt_off000119bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BB 11668 bytes
SHA-256: 8b1c8fe555c64b4bbb84da7247132ae26e624ebc18e6e123c05e9146ff518be5
font_02_sfnt_off000141af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141AF 16364 bytes
SHA-256: 95d522b2cf51f52bb926ac6861ff29a9d2946bad1fed2b3ffd2649bccaaf56d0

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