Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad6e84e0ff1ac492…

MALICIOUS

PDF

93.7 KB Created: 2021-03-24 11:16:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6bf21607ef426b318280156808c67f34 SHA-1: 76a0839f085835d7b8dd10486806dbc18794783c SHA-256: ad6e84e0ff1ac492b86b409f3e06bae9342cc9ea37444eaf5dcaf8c06b54dc7f
196 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or SEO spam campaign, indicated by the presence of a large number of external links, many of which point to other PDF files. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads. The document's structure and embedded URLs are consistent with techniques used to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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
  • 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://xajibur.ru/award?keyword=electronic+library+system+pdf PDF link annotation
    • https://cdn.sqhk.co/bopibege/h3pgeij/vr_real_feel_racing_troubleshooting.pdfIn PDF document text
    • https://cdn.sqhk.co/nakijalufiw/lspheha/chicago_police_scanner_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/janonaset/S3nhddj/99844524299.pdfIn PDF document text
    • https://cdn.sqhk.co/dulunukosep/6Qgdtgd/najidiroviromugatigajuni.pdfIn PDF document text
    • https://cdn.sqhk.co/fibafape/jihHjjQ/nyc_pba_card_benefits.pdfIn PDF document text
    • http://guvinesusavilo.iblogger.org/bidding_process_and_evaluation_management.pdfIn PDF document text
    • https://cdn.sqhk.co/vujaderaz/ijgjibM/xfinity_stream_app_manage_devices.pdfIn PDF document text
    • https://cdn.sqhk.co/vewukiziwemi/jhLhahi/dictatorial_definition_simple.pdfIn PDF document text
    • http://kazonikaxa.22web.org/electron_configuration_list.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8488b7ac-84bc-45ae-88ed-26841205fc59.filesusr.com/ugd/7cda3c_c14f9d3a5115414f837650871489f75e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/rupees_symbol_in_word_2007_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/halo_encyclopedia_free.pdfIn PDF document text
    • http://fepavipa.epizy.com/69819042067.pdfIn PDF document text
    • https://83d7d1d1-3661-4158-a2cc-78aa4aa39d08.filesusr.com/ugd/163759_e844baf858ff43f697168955eb21e0ad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/tiwipibabopetisiko.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/joyce_meyer_books_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/sas_urban_survival_guide.pdfIn PDF document text
    • http://rugiwixet.epizy.com/xuxugujebafe.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/22200457567.pdfIn PDF document text
    • https://1237a3da-0b33-4890-9ba9-974507bf2590.filesusr.com/ugd/3e0cb9_2069dc7098bb447d84eec33079940175.pdf?index=trueIn PDF document text
    • http://mikesivu.rf.gd/chrome_pc_windows_7_free.pdfIn PDF document text
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_9d1a2d4a71d540b98019ab1c68168ae6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/18539246280.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_off00012dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DBB 5500 bytes
SHA-256: d9146dc7044790938c1076b8447709452e21fec34e57926ff7c632439d183409
font_01_sfnt_off00014065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14065 11876 bytes
SHA-256: 260dda66bdb2f396ed153c77659b4ba4492ad649ca3dd2c9d0f8538ab468084f

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