Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac3d2319951d837f…

MALICIOUS

PDF

81.9 KB Created: 2021-03-25 03:59:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 5e3dca8393553516b898551b777382a8 SHA-1: ed2a6e0e7adb441ac89dee3b85426846e72077c0 SHA-256: ac3d2319951d837f342719798832d086a8a41f08fa68726e5d4bc1add36df2f8
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The file is identified as malicious by ClamAV and an ML classifier, and contains external URIs pointing to suspicious domains. The heuristic 'SE_CALLBACK_LURE' suggests a phishing or tech-support scam context, and the presence of multiple links, some on disposable hosting, indicates a link farm designed to redirect users. The document body, though heavily obfuscated, contains text related to 'Jpmorgan floating rate income fund fact sheet', likely a lure to disguise malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.
  • 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.
  • 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://zajinet.ru/123?utm_term=jpmorgan+floating+rate+income+fund+fact+sheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4394072/normal_604154d5c6be5.pdfIn PDF document text
    • http://cashthe.ru/1035346083898e6e.pdfIn PDF document text
    • http://lologunaw.mygamesonline.org/xidozozaxugogiseza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375531/normal_6040da3d19174.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413363/normal_6044970c18dfd.pdfIn PDF document text
    • http://ramerofebib.iblogger.org/calculator_app_source_code_android.pdfIn PDF document text
    • http://buytoday.cc/mixewuvarujubilomokoranzji8w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403674/normal_60261db02105f.pdfIn PDF document text
    • http://nefozufovi.scienceontheweb.net/wokadafokakezowazaw.pdfIn PDF document text
    • http://rasprodavaika.ru/fulekuxifiteyjigc.pdfIn PDF document text
    • http://namedaun.fun/bartter_syndrome_treatment_guidelinesblxch.pdfIn PDF document text
    • http://segwaywheelchair.ru/functional_independence_measure_fim_espaolajra6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://39ad70c8-6a03-4de2-a89b-b0209cba5754.filesusr.com/ugd/d2759c_bfde8887f5e84fde9cc68e0723d70a08.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7064d9f-3795-4c36-b32a-e7a4c3737e4c/crafting_and_executing_strategy_21st_edition_case_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e3d6774-4c2c-45e3-b3f3-cbec0c20b804/30612087475.pdfIn PDF document text
    • http://vitivewizonomaw.epizy.com/what_is_a_red_tag_in_triage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/795bf36f-6b0f-4663-a094-c0141f8e1729/how_to_setup_a_brother_wireless_printer_on_a_macbook_air.pdfIn PDF document text
    • http://wamigogobug.epizy.com/badomabuzogebasubeg.pdfIn PDF document text
    • https://204833c8-abda-4421-8777-5048ee7dd919.filesusr.com/ugd/e30b7a_73bf4e51f201490799706904b02b560d.pdf?index=trueIn PDF document text
    • http://zamudijofo.epizy.com/clackamas_county_sheriff_incident_reports.pdfIn PDF document text
    • http://tafisom.epizy.com/puzub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63597ce7-fff5-40eb-b4da-27258d9e020c/sefafipixagufupuvitaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb198de0-5783-4fb0-b3a1-2237be0146f4/wisop.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_off0001000b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000B 5556 bytes
SHA-256: 6de0c3c25e8dfb078f330fa9c185dfce3536c787cc5bdf97631eb203a20d6289
font_01_sfnt_off000112c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C4 11480 bytes
SHA-256: d4fbbc338cb618bb451d3425072c664443e63475546af8355be717f2cbd1059e