Malicious PDF — malware analysis report

Static analysis result for SHA-256 6518438479a50f8c…

MALICIOUS

PDF

78.9 KB Created: 2021-05-18 07:37:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 4c35efb77d4db04eda030a94b96364cf SHA-1: f2d58295b7948c4c1fb941a3ded2b385c032c33a SHA-256: 6518438479a50f8cf41141c32fe691fdc85799da3bc5048ed8fa7037f97fc5ca
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, suggesting it functions as a link farm designed to redirect users to potentially harmful sites. The presence of external URIs and the link farm heuristic indicate a strong likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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 http://xapizokawe.iblogger.org/english_alphabet_sounds_worksheets.pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417805/normal_6018f422c7106.pdfIn PDF document text
    • https://xilemizafijoso.weebly.com/uploads/1/3/4/4/134483217/punavij.pdfIn PDF document text
    • https://fotiterik.weebly.com/uploads/1/3/5/3/135328456/7562278.pdfIn PDF document text
    • https://vetaguluxidi.weebly.com/uploads/1/3/4/6/134656260/762a549d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476580/normal_603f09fbefa05.pdfIn PDF document text
    • http://pifumufupes.iblogger.org/second_hand_bedroom_furniture_for_sale_listening.pdfIn PDF document text
    • https://venefosek.weebly.com/uploads/1/3/1/8/131871910/funofuneduw.pdfIn PDF document text
    • http://balewezekowesab.iblogger.org/33889143452.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://feedproxy.google.com/~r/wb/ENAH/~3/_7yJ53orglQ/wb?keyword=how%20to%20use%20ge%20timerPDF link annotation
    • http://suregemebibu.rf.gd/44888896732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7b6df90-ed45-4132-9c14-3856cc3ec3f0/fajixog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bacee46-1e5e-4b22-82d8-47fdf42662f3/how_much_are_old_star_wars_figures_worth.pdfIn PDF document text
    • http://gedonisezif.epizy.com/arithmetic_reasoning_and_analytical_thinking_infosys_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40c67004-246d-4f19-9a12-33ac73a0d76d/wimpy_kid_dog_days_movie.pdfIn PDF document text
    • http://sowutafamewuben.rf.gd/despacito_chords_piano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6390f969-e374-431e-b9ab-92380429e819/kudiwexavaminuxokokakifup.pdfIn PDF document text
    • http://buvelijixuzumu.epizy.com/metajujulubugoxokeze.pdfIn PDF document text
    • http://ferefifadiziv.rf.gd/are_wendys_spicy_nuggets_good.pdfIn PDF document text
    • http://zuwajuzi.epizy.com/bangladesh_map_2020.pdfIn PDF document text
    • http://sujotoginejo.rf.gd/suntech_bravo_24-_hr_abp_manual.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.

FilenameKindSourceSize
font_00_sfnt_off0000ead3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD3 4592 bytes
SHA-256: c964a3a86fd820a3399e246fe047de8c9d4b58522fe64d6049c70acc6dcdf24b
font_01_sfnt_off0000fa87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA87 11204 bytes
SHA-256: b36d7834fbac2224816ab1fa35a27849d80042e82caec9cc65e2b936e8a41b03
font_02_sfnt_off0001207d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207D 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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