Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3d7f2370edb1540…

MALICIOUS

PDF

91.6 KB Created: 2021-04-25 23:03:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 82c77bcff3a0ec46822a77399b929fb3 SHA-1: 2cc38c912c8dab4c1d1b595f0ecad1cf1eeaff87 SHA-256: b3d7f2370edb1540785aef1280778715b71ed12c3355a511f395d51be74463db
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external URIs, many hosted on disposable domains or link farms, suggests a phishing or scam operation. The heuristic 'SE_URGENCY_LURE' and 'SE_CALLBACK_LURE' further support this, indicating the document attempts to create a sense of urgency or prompt a callback, common tactics in phishing and tech-support scams. No scripts were extracted, but the PDF structure itself contains links designed to lead users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://maypoin.ru/strik?utm_term=inventor+lt+vs+inventor+lt+suite PDF link annotation
    • https://cdn.sqhk.co/letarezetap/Gijjhq7/vepoxonojimugapotap.pdfIn PDF document text
    • http://fisujerekuvij.getenjoyment.net/derechos_humanos_onu_lista.pdfIn PDF document text
    • https://repotadidutu.weebly.com/uploads/1/3/4/3/134310826/zinas_gadogugupene_jareke.pdfIn PDF document text
    • https://dafanifupo.weebly.com/uploads/1/3/4/6/134645493/70229d.pdfIn PDF document text
    • http://desajegurake.scienceontheweb.net/karnofsky_performance_score.pdfIn PDF document text
    • http://tetiviguxawik.getenjoyment.net/apestoso_tio_muffin.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/ihicIja/69673547032.pdfIn PDF document text
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/ea5d71a5ff9.pdfIn PDF document text
    • http://diporesorojina.scienceontheweb.net/xeworadagifudirawugeso.pdfIn PDF document text
    • https://cdn.sqhk.co/dudexobexine/fgdlRij/carx_drift_racing_unlimited_money_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/zekuxemelop/hh9KG3M/angry_gun_m870_stock_uk.pdfIn PDF document text
    • http://vomamafawib.scienceontheweb.net/is_porter_cable_a_good_brand_of_power_tools.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
    • https://uploads.strikinglycdn.com/files/1dd083cf-be7b-4907-bec2-7ee250cdb6fa/busimijupaxewotaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9650bc2-7a6f-446a-a87d-9d669638db7a/commonly_confused_words_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/jukiwov.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/fokogusagajomumepifa.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/simple_biweekly_timesheet_excel_template.pdfIn PDF document text
    • http://jitawidavez.atwebpages.com/noruzibotikekinifowi.pdfIn PDF document text
    • http://gudukiderunusu.myartsonline.com/acres_of_diamonds_conwell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89246773-d72c-4c4c-8441-4f1d711db168/tasco_trail_camera_review.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_off00011d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4E 4348 bytes
SHA-256: 661ee8b8c5315ac87eeae68b4ad9ee1fc49f4f41e253d3b68d7aa2e20bf8dbe6
font_01_sfnt_off00012c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1D 11516 bytes
SHA-256: 0e3d8e99476db1cfb8789f58c6c67251faacf3ba8d2dec9e7b7ce6b45b51697c
font_02_sfnt_off00015345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15345 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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