Malicious PDF — malware analysis report

Static analysis result for SHA-256 212a725f0ada66d8…

MALICIOUS

PDF

82.8 KB Created: 2021-03-10 17:26:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 31d6e73b594a38ef64cb0ceb2399067a SHA-1: 7c217c4b755cd17adcefdf4bf0a305bb9984f954 SHA-256: 212a725f0ada66d88a98a86dae99fa761627d3b8b3ce347bcce137461233b78a
186 Risk Score

Malware Insights

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

This PDF document contains numerous external links, many pointing to disposable hosting services, and is flagged by ML classifiers and ClamAV as malicious. The document body mentions 'Australian visa form no 1149', suggesting a phishing lure. The presence of embedded URLs and the link farm structure indicate an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 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://midufefew.ru/123?utm_term=australian+visa+form+no+1149 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450430/normal_603e162edae33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376858/normal_6004688990cce.pdfIn PDF document text
    • https://todoxaladavefuk.weebly.com/uploads/1/3/4/5/134529573/mevajumopuweperene.pdfIn PDF document text
    • https://wurewoji.weebly.com/uploads/1/3/1/4/131438788/ca0b1852.pdfIn PDF document text
    • http://goldstein.berlin/vba_excel_formula_sumwhs3t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370543/normal_6034294f33778.pdfIn PDF document text
    • http://minuette.me/digi_online_tv2bbqmr.pdfIn PDF document text
    • https://tugigoboz.weebly.com/uploads/1/3/4/4/134499705/59ac8d.pdfIn PDF document text
    • https://gabejudunutulan.weebly.com/uploads/1/3/4/8/134887900/kadajexaxot.pdfIn PDF document text
    • http://wordsideget.top/the_secret_life_of_the_american_teenager_season_3_castm5f34.pdfIn PDF document text
    • https://dekudabor.weebly.com/uploads/1/3/4/8/134893804/9729077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404753/normal_5fe7dc20b0151.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390660/normal_5fd942d239708.pdfIn PDF document text
    • http://carishr.com/what_is_the_best_tasting_cauliflower_pizza_crustut9s7.pdfIn PDF document text
    • https://xuwovovap.weebly.com/uploads/1/3/1/6/131607152/d16b395.pdfIn PDF document text
    • https://wurilulisewanid.weebly.com/uploads/1/3/4/7/134728532/7000069.pdfIn PDF document text
    • http://megantv.site/how_to_learn_english_writing_skills_for_beginnerssi8ae.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
    • https://b7af6bb9-01eb-4839-ab56-764651de4344.filesusr.com/ugd/2486b5_14b8442d04444160a5611ac1b1165b15.pdf?index=trueIn PDF document text
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_78c0176e60164debb135bd2c36befd0f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e822343-9469-401b-93eb-2f7fbd8e7a24/karcher_pressure_washer_hose_keeps_coming_off.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a429b61-19e9-4ac3-8085-3be31cc78209/ultronic_touch_screen_thermo_alarm_clock_manual.pdfIn PDF document text
    • https://b3dfd9c9-1030-471f-a26d-814ea73dbccc.filesusr.com/ugd/d97afa_c08f92baf5dc4bd8b5a7b24dba873ef9.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_off0000fa84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA84 5024 bytes
SHA-256: c1261d77bad8854585adf8f09be0301bbda3ef0798f10a94ef9f6cbdc0ea126e
font_01_sfnt_off00010b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B80 10648 bytes
SHA-256: c6af3ff5c8797736c11313ef5e65e9e94399bf4a78c1c0f1291ac701ab44a751
font_02_sfnt_off00012fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB5 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176