Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb90b9a14542a51…

MALICIOUS

PDF

93.7 KB Created: 2021-04-01 23:40:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 132a8f8db7f796e7f41954f1ffd890ae SHA-1: 805b62dbafc72eb10797de332070cd7dbac1f619 SHA-256: 2eb90b9a14542a51789e7da2d45b750e3f78c3333bc89e65bd904e26374321fb
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing sites or download further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/strik?utm_term=lazy+boy+recliner+back+spring+repair PDF link annotation
    • https://digikugububim.weebly.com/uploads/1/3/0/7/130774990/727bf99231e796.pdfIn PDF document text
    • http://nerazegizetikam.getenjoyment.net/antimicrobial_properties_of_spices.pdfIn PDF document text
    • https://vepodiruwa.weebly.com/uploads/1/3/4/3/134374194/rovefafupa-kojufoj.pdfIn PDF document text
    • http://proita.space/47905687103wwwwr.pdfIn PDF document text
    • http://shoop-fm.ru/50237309307c3szb.pdfIn PDF document text
    • http://registrat.space/will_tesla_increase_rangetsml2.pdfIn PDF document text
    • http://itasda.online/64587384323q6nan.pdfIn PDF document text
    • https://noripuluse.weebly.com/uploads/1/3/5/9/135957130/4222528.pdfIn PDF document text
    • https://boxijobanopuvob.weebly.com/uploads/1/3/0/7/130739783/jegomi_molurerifu.pdfIn PDF document text
    • http://ponemofetu.scienceontheweb.net/dns_323_firmware_1.09_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://peledopa.myartsonline.com/how_to_use_a_presto_weighted_pressure_canner_canner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37971748-a1bc-4f33-a406-cb5f9ea2c73b/is_war_and_peace_on_netflix_australia.pdfIn PDF document text
    • http://luvepel.myartsonline.com/dba_ciencias_naturales.pdfIn PDF document text
    • https://34886cf3-15ed-44db-93e8-8979dc7c4cd7.filesusr.com/ugd/ea2c45_6dbd2bcdb59046c981514df35f6e8033.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccd34224-a104-4a1d-a9d8-5e76676b5e29/how_to_turn_off_aquacal_pool_heater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92ec0f74-a2db-48e5-8075-64f2f9984d42/4185629566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b08817ff-851d-4d9c-814f-c3a203501896/wumenatarunamadebejas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50adf055-1208-418a-8784-19ff2c8d6b6b/coach_large_crossbody_quilted.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e826f807-43b1-4efe-923e-f34e1e95d386/8299311360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9dbc288-d179-4542-8d0b-539833462269/fepanowefoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d210b6cf-6475-4bf7-947f-22dcf90f67be/macbeth_act_3_reading_comprehension_questions.pdfIn PDF document text
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_22fa2eb4cd394aef85de26aee3259a74.pdf?index=trueIn PDF document text
    • https://eff7b67d-fef5-45b7-bcd6-ffb1b71d3a14.filesusr.com/ugd/b4c9df_324d43c1afe545e1a0d7b8d4906c9a5e.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000121af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AF 5108 bytes
SHA-256: 8fc268390362de66ce482bb7b5303bff9e6feebd191367886b47442d0a732390
font_01_sfnt_off00013321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13321 11724 bytes
SHA-256: 2555bbae51c9ab3103bac390d640fbe9afa7b3252ffd039601a7f3c8e83e79f1
font_02_sfnt_off00015af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AF1 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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