Malicious PDF — malware analysis report

Static analysis result for SHA-256 016f2e68e0801e08…

MALICIOUS

PDF

76.1 KB Created: 2021-05-09 02:37:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 930bcf5c0e46b670272a09f8669f674b SHA-1: d965f023d714cd19cce2eaf64619795474f4d543 SHA-256: 016f2e68e0801e0849cf650c3c514b169276f44cfc47d0246dd2a0901e591f16
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO farms or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://druttle.ru/strik?utm_term=que+significa+so%25C3%25B1ar+q+se+te+caen+los+dientes PDF link annotation
    • https://cdn.sqhk.co/kawonidoza/28hjjiv/xikikiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409255/normal_5fc5763edf03c.pdfIn PDF document text
    • https://cdn.sqhk.co/losomilodip/iehcfge/wilderness_survival_tips.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479675/normal_6059ca41b4737.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/D1iihjm/skinseed_app_icon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366976/normal_605f4d2fed35a.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/6eba658a-95de-4ce0-b06f-4140229b81ce/93964903072.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9dae503-1786-4aa4-b249-8f68ac355509/why_does_a_moving_charge_generates_a_magnetic_field.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d4b4e0c-40e0-4cff-89c2-50e7fffe4bc6/delonghi_oil_heater_trrs0510t_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47b2df5e-e2b9-4123-8e1b-a4222f409aaf/how_to_crochet_a_granny_square_for_beginners_bella_coco.pdfIn PDF document text
    • https://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_5f9aa642bb1c48cd9dc57c529cc1d4ad.pdf?index=trueIn PDF document text
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_e771dd8811504761883696d7ba10bf0f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7b20c3c-fad7-47f5-862f-e779ac3eecce/presidential_traverse_transportation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/384b0c6e-4e4f-4bcb-b5b7-2bc479a2f47f/thank_me_later_full_album_download_zip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6805ea08-0beb-4bb6-ad7c-c23dd274c48e/sony_shake_33_for_sale_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b8c8c97-4db5-4aac-8e9e-53811676f2fd/psycho_cybernetics_book_summary.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_off0000e9d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D3 5588 bytes
SHA-256: bc5774d8df4fa1bb19d10a0358e6ef4cc7e3a2160fb2a9354bbe6d00801eb142
font_01_sfnt_off0000fc9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9E 11168 bytes
SHA-256: 4c45d010f835a44abfd80a3890cd3d4d66fb12bb46d298b566f139370b32d982

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