Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cd0a226af0d67ac…

MALICIOUS

PDF

77.8 KB Created: 2021-06-08 03:21:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: fe9fa3569e99c8228793fff13fb157d5 SHA-1: 41dddc9297dff051b1f0d9efb4d0c1abc645e25a SHA-256: 2cd0a226af0d67acf4b792a1ad17f6e5fdb4605b2c6869bcf8faea03ffb6b578
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The presence of numerous external URIs, many pointing to disposable hosting and employing UTM parameters, suggests a phishing or link-farming attempt to redirect users. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate it's designed to exploit vulnerabilities or trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://allytemp.ru/pbw?utm_term=tense+formula+chart+in+english+pdf+download PDF link annotation
    • 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://jetipufagi.pbworks.com/w/file/fetch/144609807/refekalajemidapow.pdfIn PDF document text
    • http://jolunatimavu.pbworks.com/f/keneruf.pdfIn PDF document text
    • http://zolunegoli.pbworks.com/w/file/fetch/144735468/how_to_accept_an_internship_offer.pdfIn PDF document text
    • http://rukutuxeriro.pbworks.com/f/fisica_general_hector_perez_montiel_4ta_edicion.pdfIn PDF document text
    • http://busututesemo.pbworks.com/f/merge_dragons_mod_apk_ios.pdfIn PDF document text
    • http://neruwuk.pbworks.com/f/inorder_preorder_postorder_traversal_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92b27266-251f-444a-90e0-7175f2eca27e/64840007408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21c6e79f-ff96-44ea-a292-154b33f7bbbc/rerexoxi.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/f/cules_son_los_beneficios_de_tomar_cloruro_de_magnesio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daaf879d-cefd-4988-a736-58c43ce5da60/sole_f80_treadmill_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab41c0ef-fb69-4bab-826e-c3f988e7d9f6/34035286082.pdfIn PDF document text
    • http://pukagij.pbworks.com/w/file/fetch/144586503/93582284369.pdfIn PDF document text
    • http://sisagexal.pbworks.com/f/gesodivimutoresesitixuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00438490-8f87-4295-9201-1b653b2549a3/96970596348.pdfIn PDF document text
    • http://vikowezanipe.pbworks.com/w/file/fetch/144577509/68029521892.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bc32111-fee5-4a47-9524-61731d2f3168/gcv160_oil_capacity.pdfIn PDF document text
    • http://kepigiwup.pbworks.com/f/what_does_the_apple_symbolize_in_the_giver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42c4592e-e019-4316-a223-d3031d9205a4/90389847927.pdfIn PDF document text
    • http://noxiwako.pbworks.com/f/writing_exercises_for_toddlers.pdfIn PDF document text
    • http://wigonewakil.pbworks.com/f/15034281898.pdfIn PDF document text
    • http://mapijakemifo.pbworks.com/w/file/fetch/144440040/war_room_prayer_journal_template.pdfIn PDF document text
    • http://neruwuk.pbworks.com/w/file/fetch/144644067/faletadipokodabexofer.pdfIn PDF document text
    • http://lifuzopa.pbworks.com/w/file/fetch/144819714/84713627046.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D9 5492 bytes
SHA-256: cc36da2a881d722729455e7292e719e8b7e97c87e9a46906de8dee6791da6981
font_01_sfnt_off0000f76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76B 10724 bytes
SHA-256: 40007a9dcfd9654ab446931ac1aca0ac05284b1751d8467deac619677202d3e3
font_02_sfnt_off00011ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA8 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333