Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e596250eabbc64b…

MALICIOUS

PDF

76.1 KB Created: 2021-03-28 15:10:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 9ea94ac254244420d703c431608117cb SHA-1: 93db435a94a81bac3b1a6dc9bcf0da8eb6ef99b9 SHA-256: 3e596250eabbc64bd4bab1c140d3fd6f57459d2f112e3c5f0ef0ab16c0ed24e4
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. The document utilizes a link farm on disposable hosting, presenting a lure related to PDF compression to entice users to click on external URLs. While no scripts were directly extracted, the presence of external URIs and the nature of the heuristics suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/award?keyword=pdf+file+compressor+to+100kb PDF link annotation
    • https://cdn.sqhk.co/lazujanaziri/hhijHij/68538964511.pdfIn PDF document text
    • http://bibivire.mygamesonline.org/how_to_connect_bose_companion_2_series_ii.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/bPdhbtN/color_street_jump_start_2020.pdfIn PDF document text
    • http://dizofuses.mypressonline.com/lurazud.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/25226622110.pdfIn PDF document text
    • https://cdn.sqhk.co/karefesifolo/Cjdhhjb/avg_free_win_7_64_bit.pdfIn PDF document text
    • https://cdn.sqhk.co/juwafajem/f1hJchb/chicken_gun_download_pc.pdfIn PDF document text
    • http://wugupomovupa.sportsontheweb.net/can_you_keep_a_secret_sophie_kinsella_jack_harper.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/jgAhhzC/hola_music_guitar_stand_assembly.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a616f5e3-f4be-4bbb-a252-1d0349f5caaf/bomowizusosuso.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/4117121265.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/flower_embroidery_designs.pdfIn PDF document text
    • http://xabofaveretezu.rf.gd/macbeth_act_2_scene_2.pdfIn PDF document text
    • http://solujenujaki.epizy.com/whatsapp_for_laptop_windows_8_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04fd82f5-6449-4190-876f-1e59e8690a67/zonubix.pdfIn PDF document text
    • http://toxukanubevaga.rf.gd/48172738063.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/548a2d77-6545-4168-8f4c-ab44546cfa23/whats_the_difference_between_premiere_pro_and_rush.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92f928c0-df0a-4ced-8f32-de9c465807e1/how_to_put_a_face_on_another_picture_in_photoshop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0662e2ff-a252-4375-b2e4-7aeefa3afde7/howard_miller_grandfather_clock_chime_sounds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1d80287-fcb4-4b00-abb3-955251f07e69/psicologia_y_religion_carl_jung_resumen.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_off0000ed8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8E 5492 bytes
SHA-256: 24ab10a8837a2619dc5de1d3b2913444b9ab7e0f621367a9d3843ceeeae6e058
font_01_sfnt_off0001002c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002C 10276 bytes
SHA-256: 62131d6df5268338ded346ace2459d4e964b9a7ffe7fa6b2da79ee9bd9362b9f

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