Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1abe21d129ea0cb…

MALICIOUS

PDF

87.9 KB Created: 2021-03-04 22:08:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: e3f8491a8a097408c780554862f8160e SHA-1: b3b4de9a7c34c150a274915eef1f03b22c93496f SHA-256: d1abe21d129ea0cb08be104c45c5edb6c00c74f8a8fdc7c2c22e07ae9eda9a0d
134 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a deceptive link farm, likely to trick users into downloading malware. The presence of external URIs and the overall structure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=how+to+manually+install+skyui PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446260/normal_6001519e0fbba.pdfIn PDF document text
    • http://desenusexewu.iblogger.org/dipubokogokazuvusofiraj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417658/normal_60141b253e310.pdfIn PDF document text
    • http://kusafomidufe.mywebcommunity.org/ludapip.pdfIn PDF document text
    • http://vir-tus.com/7690965295ycgxh.pdfIn PDF document text
    • http://milanbeach.fun/iceberg_slim_quotesyjciy.pdfIn PDF document text
    • http://henrysavbr.site/17396440200c52do.pdfIn PDF document text
    • http://milanomoda-italy.website/27743577631vg6az.pdfIn PDF document text
    • http://lowabunuzoxa.getenjoyment.net/how_to_put_bobbin_in_singer_talent.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gusule/assassin_creed_identity_apk_obb_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61483e65-8aea-4a09-99dd-411279c96b64/yiruma_spring_time_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf0f3b64-5cce-41a0-9909-3f9df08b93cc/iso_27001_framework.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44cfe023-d3f7-4d4d-9e5f-15905dca2689/54002636194.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/bowflex_pr1000_dimensions_folded.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33153d2f-6a17-470e-89ae-63fa8691d781/foxuzopejarokixufibovum.pdfIn PDF document text
    • http://bofoputuweja.rf.gd/56743917579.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/947e7972-9ffb-4fb2-89c4-6af930cdfb50/golds_gym_trainer_430_treadmill_price.pdfIn PDF document text
    • http://nodafawujanego.rf.gd/azar_for_pc_windows_8_free.pdfIn PDF document text
    • http://xawavejemefo.epizy.com/tedizekukazubugukalexop.pdfIn PDF document text
    • http://wajalapivibobi.epizy.com/wiwij.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/corporate_citizenship_report_honeywell.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_off00011c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C60 4952 bytes
SHA-256: bb963434a151bb593ae163ca120a1f2e197f644e6cc435ad52ffc57474b40c4f
font_01_sfnt_off00012d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D3C 10860 bytes
SHA-256: ad40e8cd1e8d5f6be069addbb01ad760eec0a59fcad03956af41525d27a64660

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