Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c5a88c4fcbb527…

MALICIOUS

PDF

73.7 KB Created: 2021-03-12 14:36:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d42c0c742595c3dd75c7f764bc263a54 SHA-1: bdf7ae9cfeb393071200cf86041bab227dcb441d SHA-256: 58c5a88c4fcbb52700f32887e9453e4c803270a4871e3248929cf7f053162a05
134 Risk Score

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. The presence of numerous external links, including a link farm on disposable hosting, suggests a phishing or malware distribution campaign. The embedded URLs and the heuristic 'SE_DOWNLOAD_BUTTON' indicate a lure to trick users into downloading further malicious content.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://soxebez.ru/award?keyword=alagappan+medicine+pdf+download
    • http://itayoga.space/rutujeme2o46g.pdf
    • http://gatorama.fun/900315677570a68j.pdf
    • https://static.s123-cdn-static.com/uploads/4476126/normal_600630fa47142.pdf
    • http://site-shop.xyz/294837577769xz8t.pdf
    • http://zugasanuko.getenjoyment.net/tosugogejesukimonewogizo.pdf
    • http://italysummer.fun/146132393190trek.pdf
    • http://mklhhhh.space/narujh3hw4.pdf
    • http://doweryklkq.space/62677498580cx2m4.pdf
    • http://fitdieta.com/what_happens_between_tessa_and_zedm541a.pdf
    • http://todayshop.website/youtube_diy_wedding_cake_standg8cdo.pdf
    • http://polypak.site/nuzukavuwomulowisipt3w4.pdf
    • http://zebinoleruf.iblogger.org/what_size_should_a_brownie_be.pdf
    • https://cdn-cms.f-static.net/uploads/4376101/normal_60265c26173bb.pdf
    • http://bandalet.club/how_to_open_multiple_files_in_one_documenttdxgv.pdf
    • http://wexixexebasober.22web.org/play_online_car_games.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://basukek.rf.gd/breeding_dogs_for_dummies.pdf
    • https://uploads.strikinglycdn.com/files/1613a635-886a-46c4-8eab-8bc3edbcc55a/35132566486.pdf
    • https://uploads.strikinglycdn.com/files/4aea35ad-1ee7-4c7e-9fcb-6fff065c021d/tanabazokok.pdf
    • http://rujidafedisezu.atwebpages.com/how_do_you_cheat_on_a_slot_machine.pdf
    • https://uploads.strikinglycdn.com/files/04dafb9c-540d-4ebd-b7aa-fa7fcb5d311a/96754712137.pdf
    • https://uploads.strikinglycdn.com/files/832c0e43-22c0-4b67-904c-e397703d7218/primer_curso_de_contabilidad_elias_lara_flores_26a_edicion.pdf
    • http://nabenejajoko.myartsonline.com/troy-bilt_4-cycle_trimmer_parts_diagram.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d76c.bin
4ec7ace3b596f089baeaa38196b00150d404d2449571867b3a5fc5276ec805a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD76C 4992 bytes
font_01_sfnt_off0000e859.bin
802ee4415c9c3633b28d9ad19c0dd2972f65d0318145e9ad83eb75acd4b8c25f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE859 10264 bytes
font_02_sfnt_off00010b8b.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8B 4324 bytes

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