Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd392c80cf731a9a…

MALICIOUS

PDF

74.8 KB Created: 2021-04-27 05:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2492e7c3fc366281510463be9fc810f1 SHA-1: 2b9690e91d72423457a7ddcc44046ce4aac564b3 SHA-256: dd392c80cf731a9a88fa8d6e67795b4c7c29a69b8411a390b954faa6a732f8bb
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing or a trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/strik?utm_term=does+it+make+you+feel+good+confidence+man PDF link annotation
    • https://cdn.sqhk.co/disumuneriva/7mHehin/download_game_vr_android_roller_coaster.pdfIn PDF document text
    • http://tatuvidara.iblogger.org/jaxorofe.pdfIn PDF document text
    • http://universal-kirov.ru/jodefofewikenajamesme1f.pdfIn PDF document text
    • http://rmk4sale.xyz/834023949158ipd3.pdfIn PDF document text
    • http://fortuneo.biz/0_36_months_developmental_milestones0w27q.pdfIn PDF document text
    • http://mushygushysayings.com/rilup96a1n.pdfIn PDF document text
    • http://all-casino.xyz/jonopuzowefidixutuzafasoa6vy6.pdfIn PDF document text
    • http://cetakchantek.com/36292922531vg0f0.pdfIn PDF document text
    • http://kvadro63.ru/33053694462qegfl.pdfIn PDF document text
    • https://cdn.sqhk.co/bebiwamulanu/BhhOjeO/voltage_drop_meaning_in_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/rewazexi/ibzjjgi/first_grade_sight_word_practice_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/xavaxonad/LFjdlgg/arctic_animals_coloring_pages_for_preschoolers.pdfIn PDF document text
    • http://cleaner360.shop/shelter_island_real_estatepa7bb.pdfIn PDF document text
    • http://alkostore.xyz/minn_kota_i-pilot_remote_wont_turn_onf348d.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://vofaxov.epizy.com/45979429287.pdfIn PDF document text
    • http://winovewivigo.rf.gd/adobe_reader_free_download_for_windows_7_32_bit.pdfIn PDF document text
    • https://8f6f9f04-f977-4239-955d-f6aecf2dd879.filesusr.com/ugd/81cd61_cff832e1bf5942b4be7b841b9bceb192.pdf?index=trueIn PDF document text
    • http://patuwovoparivi.rf.gd/chikati_gadilo_chithakotudu_full_movie_telugu.pdfIn PDF document text
    • http://pogifovemujure.epizy.com/54305296857.pdfIn PDF document text
    • https://e18e6c05-101e-4f41-9c4d-f518aea09dbb.filesusr.com/ugd/7972b3_b1670d5d328644f986cd5b70058b2a4e.pdf?index=trueIn PDF document text
    • http://kowekunebu.rf.gd/how_to_connect_wii_remote_to_dolphin_android.pdfIn PDF document text
    • http://fizanotafogibag.rf.gd/84281111367.pdfIn PDF document text
    • https://adc0bc6f-2b4d-4951-bce0-9128d215fa34.filesusr.com/ugd/5ea4d5_9a67b50e95c1451ab03f366b535ed3ae.pdf?index=trueIn PDF document text
    • http://gudinomid.rf.gd/sufatazares.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_off0000d8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F2 5292 bytes
SHA-256: 0545c3b4c31b085e87c45b073cf45379429962bcf16b92cbb15198629c281fff
font_01_sfnt_off0000eaf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF1 10828 bytes
SHA-256: 57480264e1f397b9c2d62b42750ece9b450abd9a8d4ec23fac7c03353740c2f1
font_02_sfnt_off00010f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F69 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2