Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b064962125e8cae…

MALICIOUS

PDF

72.6 KB Created: 2021-04-07 04:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8db607a1459c59693b3015de66b30ab3 SHA-1: cc71f871a6505e0ee38495524afe032e80166e99 SHA-256: 2b064962125e8cae09cea75e92e8d3162cf5b5addf816431790003f02003686a
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as a guide for replacing a convection oven fan. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded malicious URL suggest it's designed to redirect users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://dafemum.ru/strik?utm_term=how+to+replace+a+convection+oven+fan In PDF document text
    • https://static.s123-cdn-static.com/uploads/4499309/normal_5fcab03c95586.pdfIn PDF document text
    • http://cleanup-sale.site/95677050663idgoz.pdfIn PDF document text
    • http://fartook.online/mcgraw_hill_practice_act0vkxy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469831/normal_604d195a06eb2.pdfIn PDF document text
    • http://ighelpcenter.xyz/el_pollo_loco_classic_chicken_salad_nutritionvuyt6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409623/normal_6042a525684d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369323/normal_605db55343006.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444114/normal_602e22596c746.pdfIn PDF document text
    • http://trokot-tonirovka.online/blue_colour_images_freejcyy1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402246/normal_60249816d137a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469633/normal_604789c54a19b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505363/normal_5fe5abcb7f0e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427086/normal_604ad6fb321df.pdfIn PDF document text
    • http://leafester.online/17400358563cw1xy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367938/normal_5fffe0696ca27.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/c0d38b61-bfb9-47b3-901a-49e80296969e/47592559444.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/89258086090.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/jifavogetanepazedar.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/ocr_a_level_biology_textbook_answers_pearson.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/86615038322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4795c31d-794a-4018-a75d-10618c876e05/nidijutubutew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecc5889d-1298-4122-9719-eda71fb9adbe/20888466523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dc19761-feae-434b-8e2c-0691adb679b8/76693602414.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/90412346567.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/how_much_school_to_be_a_dentist.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/avast_5_free_full_version.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAB 4944 bytes
SHA-256: bf4dda715ab0f5b6a868bd65a7cc4770224daea088d040c3ff9db71f705dddac
font_01_sfnt_off0000eea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA2 10592 bytes
SHA-256: 45405e45b8d15a08dbbd8568af50a09238a4e01876532b1b6a54521d8427678f

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