Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff8f1decb5df54d…

MALICIOUS

PDF

91.7 KB Created: 2021-01-21 14:00:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 197e430b43af35013c8cb216bc4a9610 SHA-1: 8dc6ec1824c3b19c9760bd5d48e969ea9e6c594d SHA-256: 2ff8f1decb5df54d9fc2f7ce1271bb43f971787a6c637e9a01f7ae4b2618b0c5
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains or link farms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

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 https://druttle.ru/wb?keyword=field%20hockey%20coaching%20jobs%20nj PDF link annotation
    • https://site-1167954.mozfiles.com/files/1167954/people_nearby_telegram.pdfIn PDF document text
    • https://site-1176380.mozfiles.com/files/1176380/jiduvebaxu.pdfIn PDF document text
    • https://site-1173572.mozfiles.com/files/1173572/lunadovomugoxemubirunuvab.pdfIn PDF document text
    • https://site-1166725.mozfiles.com/files/1166725/74595344616.pdfIn PDF document text
    • https://site-1174138.mozfiles.com/files/1174138/lowefelo.pdfIn PDF document text
    • http://josebixotarez.22web.org/lovuma.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/commandos_3_android.pdfIn PDF document text
    • http://zoxuwabemowel.epizy.com/ww2_flight_simulator_games_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/5298276930.pdfIn PDF document text
    • http://gizogebinide.rf.gd/bones_tv_series_season_5_episode_guide.pdfIn PDF document text
    • http://juzavinozil.epizy.com/gallifreyan_language_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/tolubof.pdfIn PDF document text
    • http://luwulifinuneti.epizy.com/rinino.pdfIn PDF document text
    • http://nitesegu.epizy.com/managing_negative_thoughts_worksheet.pdfIn PDF document text
    • http://jawuguv.epizy.com/75_common_interview_questions_and_answers.pdfIn PDF document text
    • http://lisuxuzilim.epizy.com/68074329994.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.

FilenameKindSourceSize
font_00_sfnt_off000128a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A4 5440 bytes
SHA-256: ebdc0143c92acdbf07e92dc1c365d8ef60431a3956e397e914d3f49fc831a252
font_01_sfnt_off00013b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B2C 11440 bytes
SHA-256: f52b0062fc94ee3cae433655f040ed6963a157077e98d6b32f8764b46e28186d

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