Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aababd52f0f31e1…

MALICIOUS

PDF

81.1 KB Created: 2021-03-29 04:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d37e0ea93866534bfc8678372c25d200 SHA-1: 549de4cef7b159f573058aa050989d1b34888e09 SHA-256: 6aababd52f0f31e116c7a82a6ff52db1993d728ffce38d512d3a77d99be2c251
226 Risk Score

Malware Insights

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

The PDF document contains a lure related to iPhone factory reset protection, directing users to a malicious URL. The presence of a large number of external links, many on disposable hosting, indicates a link farm designed to distribute malware or phish users. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://mezovuduw.ru/strik?utm_term=factory+reset+disabled+iphone+5c+without+computer PDF link annotation
    • https://cdn.sqhk.co/fekebazi/gcjjihz/learn_spanish_language_book.pdfIn PDF document text
    • https://cdn.sqhk.co/wemofisejaf/sigsZhj/coaching_center_mobile_and_backend_app_nulled.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/5jijbRY/xupufilosigobux.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/14065744993.pdfIn PDF document text
    • https://cdn.sqhk.co/nimuxugemu/Wkehaib/megimuvulamevefakelij.pdfIn PDF document text
    • http://fiwimupatemo.22web.org/tivekatopopuba.pdfIn PDF document text
    • https://cdn.sqhk.co/peruvereraba/gjgidrm/49786271921.pdfIn PDF document text
    • https://cdn.sqhk.co/rirerujel/fgyJjjf/stephen_king_red_rose_movie_online.pdfIn PDF document text
    • http://wewofif.scienceontheweb.net/how_fast_does_honda_rebel_300_go.pdfIn PDF document text
    • https://cdn.sqhk.co/wafizogep/i9ggljj/brazing_soldering_and_adhesive_bonding.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
    • http://tojetejuru.rf.gd/project_report_on_budget_and_budgetary_control.pdfIn PDF document text
    • https://a4067306-84c0-45ce-9c36-3cbb795fcb37.filesusr.com/ugd/d5b970_edaefeaace9d48b8b93ae0b3e3ba510c.pdf?index=trueIn PDF document text
    • https://50c84cdf-c8d4-407e-a307-361b94491100.filesusr.com/ugd/f2656e_483bb74851ca4b84ab8b3508055f0946.pdf?index=trueIn PDF document text
    • https://54fa3baf-6954-44a2-98df-2137f0cc340f.filesusr.com/ugd/14b79e_dd6e9633cc804ee68cb253fa5c5f8f86.pdf?index=trueIn PDF document text
    • http://xuwabofori.epizy.com/retepofebi.pdfIn PDF document text
    • https://50c84cdf-c8d4-407e-a307-361b94491100.filesusr.com/ugd/f2656e_f8a8cad73f6844b289c58dd8aa42ecc9.pdf?index=trueIn PDF document text
    • https://05b56818-8b0b-4484-a411-4f1234233f1c.filesusr.com/ugd/e49726_99d6a6f03dae408a91dc5041b98a704e.pdf?index=trueIn PDF document text
    • https://fe2b84af-b373-48e0-a714-f820169e3fe9.filesusr.com/ugd/ed1d2e_13601221b875404d8f31789db5108ef0.pdf?index=trueIn PDF document text
    • http://logiweliziweje.onlinewebshop.net/nigirokeve.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_off0000f0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FD 5608 bytes
SHA-256: 658035ebca8cd62fa123eeef3556db0f8e0c3769ab44967dcda184a4e7073e47
font_01_sfnt_off000103ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EA 10716 bytes
SHA-256: 3e85f095ca2a357d2d462bb76eba44dcbe75c56a3d42a3039fb9586839d02066
font_02_sfnt_off00012877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12877 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230