Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdabbac4db1d8dbf…

MALICIOUS

PDF

78.6 KB Created: 2021-03-23 07:19:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: ee2d78361d8a35c3a47761a3f45a601c SHA-1: 58559fcf5d09666af7b150645b5530c190d74d6c SHA-256: cdabbac4db1d8dbf0c5254e0f0e454cfd1e5e4c4ef1e6628bfff04280c5dbe10
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as legitimate documents, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URLs likely lead to malicious content or phishing pages, aiming to trick users into downloading further payloads or revealing sensitive information.

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://leonvi.ru/award?keyword=historical+perspective+of+management+pdf PDF link annotation
    • http://laitlabs.pro/what_are_the_5_themes_of_geography_and_their_definitionsdk4cq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411220/normal_6000e459b2aeb.pdfIn PDF document text
    • http://fakurivevid.scienceontheweb.net/kibufinubofadesavipazixu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428335/normal_60037ade61f3b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457848/normal_5fecf167690e7.pdfIn PDF document text
    • http://kakolamilasaru.medianewsonline.com/non_contact_voltage_detector.pdfIn PDF document text
    • http://copyrighthelpptteam.com/ohms_law_worksheet_answers_13.3lp93g.pdfIn PDF document text
    • http://myshoes.moscow/what_is_the_oldest_known_civilization_in_central_and_south_americaxl9tx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_d500411ffe31472da2d1864783bd116a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/reporting_time_at_airport_for_domestic_flights.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/can_i_use_my_own_modem_router_with_verizon_fios.pdfIn PDF document text
    • https://d3826037-6016-486c-99e9-dc41bc666644.filesusr.com/ugd/b81754_4c20a7d5182043efbe56faed74facfbc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/99232916966.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/bronchiectasis_management_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/fiwunoxewuzawavazitavebe.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/casper_mattress_consumer_reports.pdfIn PDF document text
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_60a3edfef8a141bbb20889b2e26adc7e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luxelula/technical_report_writing_for_engineers.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/58596202098.pdfIn PDF document text
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_53c33b93fe1642508928688b80585466.pdf?index=trueIn 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_off0000f427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF427 5496 bytes
SHA-256: 194a7a59ee717f1535aaf3618901fff963c938697f792c47df8b39ebbaa673d7
font_01_sfnt_off000106c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C9 10820 bytes
SHA-256: 3966ebc6135ba20f0f29065d87892864b59f6c2026464e941e83a8c4a5472c1c

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