Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f30208678d12bf…

MALICIOUS

PDF

74.3 KB Created: 2021-02-25 20:49:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 14b15a0fe7185af2bebebb860132bc77 SHA-1: 43b33ce1e75a4133492e3d28440ba77ea412c412 SHA-256: 70f30208678d12bf72bdf5fd12dcbb68056912e52eb9f3cb5fb22a310985858b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm with numerous external URIs pointing to potentially malicious domains, suggesting a phishing or malware distribution scheme. The embedded URLs and the PDF's structure strongly suggest it's designed to redirect users to 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://jottigo.ru/wix?keyword=happy+wheels+5+unblocked PDF link annotation
    • http://forkidsshop.online/471973723097r1kv.pdfIn PDF document text
    • https://cdn.sqhk.co/luwonowuwig/1Gjdsie/daily_planner_2020_template.pdfIn PDF document text
    • http://stroiline74.ru/20157582201g4liv.pdfIn PDF document text
    • https://cdn.sqhk.co/jimikafede/hgqpagi/stickman_annihilation_2_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kibizatududo/aqujeHP/rope_ball_door_stop_grey.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455914/normal_602b0622ae1da.pdfIn PDF document text
    • http://levantemosaic.com/bollywood_party_song_2019_mp3_free_downloadb9psu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pojudezafal.rf.gd/how_to_write_spoken_word_poetry.pdfIn PDF document text
    • http://fonaxipovun.epizy.com/nice_intrapartum_care_guidelines_2017.pdfIn PDF document text
    • http://rumapipenuwiwo.rf.gd/building_and_testing_with_gradle_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/bheema_telugu_songs_ringtones_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/wow_classic_leveling_guide_1-_60_horde.pdfIn PDF document text
    • http://pakebojubo.rf.gd/97206190547.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_off0000e597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE597 5548 bytes
SHA-256: a64732a5e67a235b54f74b158ad9cfe21f55dfe62b38888051b60dab23151d5e
font_01_sfnt_off0000f889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF889 10504 bytes
SHA-256: a386a2bbf842883f27ba9b5f960c89a3bb0dcc35fc028eba997ec0e2525e6690

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