Malicious PDF — malware analysis report

Static analysis result for SHA-256 d03d511edd8c2bd1…

MALICIOUS

PDF

79.9 KB Created: 2021-03-24 00:34:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8dfb7a33a0be67764a56f92b0141b05e SHA-1: 96dd0435d33bf38d8353dd0b87b768fe2e5d5fd6 SHA-256: d03d511edd8c2bd1811db0e9be5fd3dcd46472dc4f9412038bc9af6139a27865
126 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, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, and is structured as a link farm. The document body, though heavily obfuscated, suggests a lure related to Australian visa forms, indicating a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/award?keyword=australian+visa+form+pdf PDF link annotation
    • http://nolebuk.22web.org/international_logistics_and_supply_chain_management_notes.pdfIn PDF document text
    • http://lanurekomi.22web.org/misaninek.pdfIn PDF document text
    • http://dalnoboyi.xyz/old_yeller_characters_description68a72.pdfIn PDF document text
    • http://bnatural.space/double_reflections_over_intersecting_lines_worksheett5j7e.pdfIn PDF document text
    • http://kigapoxifaxixem.22web.org/panasonic_answer_machine_instructions.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tikarere.epizy.com/proof_of_circle_theorems_maths_genie_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/mepuminogitetunija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/839e9070-7b4d-4092-883f-cd51e501a514/31797684625.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db4258e2-98f9-4086-b65d-633559d259e4/pozowerozatij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19967efc-fd84-434e-9997-c5e39ffa6e8b/what_does_the_word_araby_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/55279099707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c2eea7a-ba08-4e9a-81a9-4f1b157797bc/6094217310.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/harry_potter_easy_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/fast_breeder_test_reactor.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/29144387497.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/chuyen_file_tu_sang_jpg_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c45854c-c780-4fb6-9175-b6a5de83f88b/spivak_calculus_on_manifolds_djvu.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/el_hobbit_3_pelcula_completa_en_espaol_latino_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f444fc34-32dd-40d6-a77b-9efa1224cdc4/zoom_g1xon_price_in_bd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66ba490d-fa1f-4bab-a6f9-6a668c26c7e8/bersa_thunder_parts_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b0f3d1f-0478-4b6d-8b85-9bd6daf44426/frank_zane_training_routine.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_off0000f941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF941 5236 bytes
SHA-256: d8c5186660630b4f9f5e166e3a827e2de0ff6f474d4bd322366f85ecdcb3f671
font_01_sfnt_off00010b05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B05 11340 bytes
SHA-256: 891d416e3219b0634d5719bd4f81a9f05dcd061879a4c14fe808fdb4d54ac84e

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