Malicious PDF — malware analysis report

Static analysis result for SHA-256 181b33b6d94d060e…

MALICIOUS

PDF

72.6 KB Created: 2021-03-17 19:54:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 8a8769917635120500352998d7762291 SHA-1: 8112c1af61445dcd1e12f00dac01e859af8fd59f SHA-256: 181b33b6d94d060ef03087edde8712044e6e5db0fef3b8e0a234e414717ca847
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple external URLs, with one specifically identified as a lure for 'free piano sheet music'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of numerous disposable domains and UTM parameters suggests a campaign focused on redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://dugedepap.ru/123?utm_term=heigh+ho+piano+sheet+music+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420906/normal_5ffb57c94e63e.pdfIn PDF document text
    • http://topafigo.mypressonline.com/amelie_piano_sheet_music_comptine_d_un_autre_ete.pdfIn PDF document text
    • http://twoup-viktoria.online/jagemiwitejozerulidivt9gd.pdfIn PDF document text
    • http://axecheat6.xyz/lego_hidden_side_app_fire_tabletrtzgo.pdfIn PDF document text
    • https://cdn.sqhk.co/lididiregi/Aqhhjbb/waxalunubemasolanetadunal.pdfIn PDF document text
    • http://xegafutulon.iblogger.org/13587890951.pdfIn PDF document text
    • http://familyit.info/topowememikixuvagososasowrjsrh.pdfIn PDF document text
    • http://xekinivafu.iblogger.org/13528146653.pdfIn PDF document text
    • http://zathkatow.xyz/wow_computer_specs_requiredx6mgt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370059/normal_5fd67cc60e393.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454808/normal_6041c04ef0649.pdfIn PDF document text
    • http://tujijamutibe.sportsontheweb.net/nuzexi.pdfIn PDF document text
    • https://cdn.sqhk.co/mojazejo/nhhzgeS/fake_doctors_note_template_urgent_care.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494430/normal_6027421ab895e.pdfIn PDF document text
    • http://ontrade.top/wodizerepevifb4zr6.pdfIn PDF document text
    • http://sipataj.sportsontheweb.net/on_green_dolphin_street_miles_davis_chords.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_b19772e6865046a8a0ab641a89e08d10.pdf?index=trueIn PDF document text
    • https://1682489e-d94b-4f22-b6a6-c8ecb623ca2e.filesusr.com/ugd/5f226e_5ac14fb5a32949e9bdfa075f20a053ba.pdf?index=trueIn PDF document text
    • https://160e4e15-e27a-4ef2-9b26-f67fc0969a86.filesusr.com/ugd/cbdbb6_96edcf31334946b4b0833b043c637493.pdf?index=trueIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/65226320505.pdfIn PDF document text
    • http://relotetuje.rf.gd/classifying_polynomials_by_number_of_terms_worksheet.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/george_foreman_net_worth_2017.pdfIn PDF document text
    • https://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_32ad5868ceb046398cd4fa18fa156132.pdf?index=trueIn 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_off0000db98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB98 5356 bytes
SHA-256: 12c08baf0d975432c9c6ce7bb7fcd35b0f94e276aa3168ac5b44535ae6ed4a35
font_01_sfnt_off0000edae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAE 11416 bytes
SHA-256: ab2b49af1997e3aed3f7aa2fcad2e716a44ac8088a66cad63029df77d38e3e8a

Open this report in the interactive analyzer, or submit your own file for analysis.