Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0146d9e0daead3…

MALICIOUS

PDF

88.2 KB Created: 2021-03-27 16:55:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 080f8dcab012901964aedf5256ae9c71 SHA-1: 881b8acefd59cc22eaadd2c5ed7eef73d887c7da SHA-256: 2d0146d9e0daead332e46c64b710394c9522bf1ed15d47a50d8e9ac248217818
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://nipisod.ru/123?utm_term=acnl+hybrid+flower+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4402938/normal_5fcc78bae8bc2.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/ms_sql_server_management_studio_tutorial.pdfIn PDF document text
    • http://fosireditoj.mygamesonline.org/how_to_care_for_gerbera_daisy_plants.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/how_to_determine_which_solvent_to_use_in_recrystallization.pdfIn PDF document text
    • https://voperupazekeko.weebly.com/uploads/1/3/4/5/134505312/ac1dd16de.pdfIn PDF document text
    • https://rimofunoduw.weebly.com/uploads/1/3/4/5/134525219/sipelironajedof-depatomanezil-lamep-xufotokafi.pdfIn PDF document text
    • http://tuzogat.sportsontheweb.net/pi-1206_form_wi.pdfIn PDF document text
    • http://zutumufedige.getenjoyment.net/21299478887.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449397/normal_6056de06ec179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408721/normal_60256e2593731.pdfIn PDF document text
    • http://retapadu.medianewsonline.com/vumozigixorituweredofava.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/ad9094b9-765f-46c9-bf6f-caf69153a67a/bokifizubomu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26969d6e-e9a5-4172-80f9-d1538d655949/rikam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71aa65d5-315e-40d2-a05b-a6ee6c93e9f5/real_book_6th_edition_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/kigamuluzera.pdfIn PDF document text
    • http://kisalonokexiwi.atwebpages.com/venodoturebogoxuguxaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1715ac25-3a06-4ae8-a013-bfa965d11c3c/raforosaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1062cc3-d4da-4a58-af89-cc38442d0838/pablo_neruda_nobel_prize_poem.pdfIn PDF document text
    • http://tixofimisupabev.onlinewebshop.net/luvobuzixilire.pdfIn PDF document text
    • http://bibezakomi.myartsonline.com/national_aboriginal_and_torres_strait_islander_education_policy_1989.pdfIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/41820996347.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001024c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024C 5220 bytes
SHA-256: e8019993f1ea89ed957e423b0f01f071cd8ccc7c8e9126a2418b65c1c5ff3611
font_01_sfnt_off00011422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11422 11516 bytes
SHA-256: fca7c199a94c5ee7eaf6bbebcbecbf3b19821564e78306850f831b8aa71b03bd
font_02_sfnt_off00013bb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BB7 17116 bytes
SHA-256: d378633d0c2eeecde80692feb63d43440230a311d4a06bbdb313c28e7e194118