Malicious PDF — malware analysis report

Static analysis result for SHA-256 108e05f586520f09…

MALICIOUS

PDF

74.9 KB Created: 2021-02-26 18:05:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 59c65d2dc123e66f6d309771d427c9b3 SHA-1: 99603029f42b9d32f54934ca91d7afc057338ad6 SHA-256: 108e05f586520f09901dd8be863ba4561a68ed264a1e248a7f4aa55fa6551b91
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a machine learning classifier and ClamAV. It contains numerous embedded URLs pointing to disposable hosting domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to be a pretext for directing users to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/wb?keyword=short%20stories%20to%20read%20in%20free%20time PDF link annotation
    • http://julivojurukumu.sportsontheweb.net/the_sims_3_generation_serial_key.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/why_is_h2so4_a_stronger_acid_than_h2co3.pdfIn PDF document text
    • http://pigigozoruda.mypressonline.com/how_to_connect_vizio_sound_bar_to_sub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486356/normal_5fdfa62028e21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403406/normal_6011f403f0e7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373797/normal_60119829ce147.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370780/normal_60371aa0aa499.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/qHKefib/babavorefofowopat.pdfIn PDF document text
    • http://kufafukedexepix.mygamesonline.org/how_to_count_to_1000_in_spanish.pdfIn PDF document text
    • https://cdn.sqhk.co/totafeta/jKGggjP/268602011.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/hicjajb/city_image_barber_shop_clifton_nj.pdfIn PDF document text
    • http://reform-st.ru/outlining_your_novel_templaterokpq.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/what_is_the_most_viewed_rock_song_on_youtube.pdfIn PDF document text
    • http://bebetadiruj.mywebcommunity.org/how_to_understand_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/rTejcgc/75386030153.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/72573945161.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/dewazewokib/8877953047.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/56164055227.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/vision_ias_prelims_2019_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/saxuvok.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/telangana_maa_bhoomi_app.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/kayla_itsines_ab_workout_cosmo.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_off0000e9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D1 5216 bytes
SHA-256: 61d08e63eddf5fc6ebf08882b8a2e259e19728c59ec85d11b829720c4cc0782c
font_01_sfnt_off0000fb62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB62 10164 bytes
SHA-256: 6db6bba4220df7196789d1f4041ec04b0ef6e7dc5f1d7957ad9321789cf20362

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