Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc75c5c39dcb286d…

MALICIOUS

PDF

73.7 KB Created: 2021-09-12 22:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 3a3d964ff35d751e0b16e73344760673 SHA-1: 3ab2823e17f317225614282ba8898169538d23f2 SHA-256: fc75c5c39dcb286de679a45eccc83c1d36d9656adfee7b93f2ac346d4b232765
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs, many of which point to compromised CMS upload directories or are part of a link farm on disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of 'icloud+bypass+hello+screen' in one URL indicates a potential phishing lure related to device unlocking.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://philabc.ru/uplcv?utm_term=icloud+bypass+hello+screen PDF link annotation
    • http://digitalqwerty.com/ckfinder/userfiles/files/47888023587.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/72459649868.pdfIn PDF document text
    • http://krallarintavugu.com/upload/file/gupawezajoturudajesazirum.pdfIn PDF document text
    • http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/49087842407.pdfIn PDF document text
    • https://ksmt.edu.np/assets/ckfinder/userfiles/files/zajazitorapopetilogeta.pdfIn PDF document text
    • http://surmounttravel.com/userfiles/files/kegovoximiximexonera.pdfIn PDF document text
    • http://civicwomen.com/ckfiles/files/wesibotokesozewa.pdfIn PDF document text
    • http://dgjst.com/upfile/file/milaniraweje.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/26802840788.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/jagokipodunasejagoga.pdfIn PDF document text
    • https://stradatextiles.com/upload/ckfinder/files/28463814902.pdfIn PDF document text
    • https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/45183201995.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad7c0ec3a9---18297107028.pdfIn PDF document text
    • http://1night2day.com/UserFiles/file/34552113182.pdfIn PDF document text
    • http://knipia.com/userfiles/file/mupexid.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/100353b9b4731a29bb9597b24e00d08e/narelixivo.pdfIn PDF document text
    • http://ucg-eg.com/userfiles/file/21371544738.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/761fdf102eb1bd380f1fa8dfe035482a/73789011811.pdfIn PDF document text
    • https://www.passion-rnd.com/upfile/files/2021/09/03/44185180076.pdfIn PDF document text
    • https://euforbiabulgaria.com/uploads/pages/files/lalifexujo.pdfIn PDF document text
    • http://pizzeriadevita.it/userfiles/files/nuretovamabejufaxo.pdfIn PDF document text
    • http://bakefruit.com/uploads/files/202109030403156669.pdfIn PDF document text
    • https://lordoptika.hu/files/files/dasinonivowom.pdfIn PDF document text
    • http://jsushibrea.com/uploads/files/firebisurelawomi.pdfIn PDF document text
    • http://vxclouds.com/userfiles/file/4883410454.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://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_off0000bc4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC4E 10724 bytes
SHA-256: 0465885d3c3d84567d19d26c1d6c0c4529505d6e52c40b2e6ec9953472fc1030
font_01_sfnt_off0000d4b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ecc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC5 17140 bytes
SHA-256: dcea72db27e9122ab0b7ca2a05dafda8f480ac846e7f8b752adfe2391dd6f183

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