Malicious PDF — malware analysis report

Static analysis result for SHA-256 97adbccd6990ed3a…

MALICIOUS

PDF

74.1 KB Created: 2021-06-01 02:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c230d66434fab556f5778d906efaa0b9 SHA-1: dd9495669caee1778fe8e2525af40dee1a0fa726 SHA-256: 97adbccd6990ed3af23e810631a5601052b8d90ea97c73e99890e3341470e099
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one prominent URL pointing to 'wastran.ru' which is associated with a potential phishing lure disguised as a service manual. The PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://wastran.ru/pbw?utm_term=john+deere+gator+tx+service+manual
    • https://cdn-cms.f-static.net/uploads/4426547/normal_605b47833bbe8.pdf
    • https://parukiwodisurup.weebly.com/uploads/1/3/4/4/134455528/6620f258c68d4.pdf
    • https://static.s123-cdn-static.com/uploads/4367632/normal_5fc5aefed2d43.pdf
    • https://nowitijot.weebly.com/uploads/1/3/4/7/134716658/7155086.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kufogokoges.pbworks.com/f/honda_gc160_5.0_pressure_washer_fuel_pump.pdf
    • http://pitevaj.pbworks.com/f/92425569786.pdf
    • http://xosufixemuf.pbworks.com/w/file/fetch/144433176/karifarubenanavoz.pdf
    • http://zeladejan.pbworks.com/f/40359719456.pdf
    • http://mikabipi.pbworks.com/f/el_espiritu_de_dios_esta_aqui_letra_y_acordes_de_guitarra.pdf
    • https://uploads.strikinglycdn.com/files/ef299ad4-1baa-47fe-ab35-90718e3dfa59/80642990813.pdf
    • http://masawumel.pbworks.com/w/file/fetch/144428133/bahubali_1_telugu_movie_songs_download.pdf
    • http://nilanom.pbworks.com/w/file/fetch/144428982/ielts_test_4_reading_passage_1_answers.pdf
    • http://siwuromo.pbworks.com/w/file/fetch/144424731/61667316542.pdf
    • http://zigunef.pbworks.com/w/file/fetch/144432579/who_are_the_character_in_the_story_the_last_leaf.pdf
    • http://nigezid.pbworks.com/f/86959922397.pdf
    • http://xojifot.pbworks.com/f/kobugo.pdf
    • http://lakebimutep.pbworks.com/w/file/fetch/144418053/how_do_i_get_a_single_status_certificate_uk.pdf
    • https://uploads.strikinglycdn.com/files/accabd50-2fec-49a0-9cde-14cc77161b08/80585732990.pdf
    • http://wuvebag.pbworks.com/w/file/fetch/144428778/solving_systems_of_equations_by_graphing_worksheet_answer_key_kuta_software.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2b0.bin
9a4b39c8793f4122ce2c644f95ef421afc970b0e79c5555acaa5ff3ef987499d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B0 5468 bytes
font_01_sfnt_off0000f527.bin
3d2b36278785a4e2d01eee8becabde1fef45cc32a392267178d03e6128b74c5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF527 11848 bytes

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