Malicious PDF — malware analysis report

Static analysis result for SHA-256 505f9c5dbdc6f50e…

MALICIOUS

PDF

90.4 KB Created: 2021-05-08 00:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7d9ad776b16d37ef36e6602f1bc1ecbf SHA-1: df09c8d8c77f3a4236ed371b62daa567bc543e86 SHA-256: 505f9c5dbdc6f50ea45de7ab6f6b99e2b5b541c312550b71a4ee7469914f0bf5
146 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a callback phishing lure. The embedded URLs and link farm heuristics suggest the document is designed to redirect users to potentially malicious sites, possibly to download further payloads or initiate a scam. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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) or Microsoft license-boilerplate 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://dugedepap.ru/strik?utm_term=networx+nx-4+reset+master+code PDF link annotation
    • https://cdn.sqhk.co/bivaxijo/ij7Dojd/missile_escape_mod_apk_android_1.pdfIn PDF document text
    • http://wimuzawoxi.getenjoyment.net/gudejojumedomivudaw.pdfIn PDF document text
    • http://konalofasu.mywebcommunity.org/edtpa_task_2_instruction_commentary.pdfIn PDF document text
    • https://cdn.sqhk.co/sajixobuko/PghBegf/xoben.pdfIn PDF document text
    • http://arevakar-travel.com/zoveszf03n.pdfIn PDF document text
    • https://cdn.sqhk.co/lexebogefaj/gif0sqy/84304198921.pdfIn PDF document text
    • http://itchia.space/how_to_assess_for_postpartum_depressionpjewl.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/gigojufim.pdfIn PDF document text
    • http://zuvalasit.mypressonline.com/ethnic_conflict_in_nigeria.pdfIn PDF document text
    • http://new-volosi.ru/wd_my_passport_wireless_ssd_vs_projebap.pdfIn PDF document text
    • http://look-hotel.com/email_address_format_rfcd0q77.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirurafixi/PhhiaGR/37738084387.pdfIn PDF document text
    • http://jibakerutev.mypressonline.com/define_direct_rule_system.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/edhcghb/carrier_services_app_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luvepel.myartsonline.com/liwujewojitemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27a2e32e-25b8-4de2-8066-d135567a7f41/sport_dog_shock_collar_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/212fb5d4-6b25-496d-b09d-671ec7c3ba34/song_of_solomon_8_7_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fc1f022-3655-4549-96dc-5ef37a5d4017/cuando_se_va_a_poder_viajar_entre_provincias_en_espaa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a37efa6e-91d0-4f2e-a0af-03c1cc38a616/how_many_calories_in_wendys_jr_fries.pdfIn PDF document text
    • http://todidetiped.onlinewebshop.net/riesgo_cardiovascular_aha.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b93df4f0-fe3f-4082-9246-c8877766bab7/45281536192.pdfIn PDF document text
    • http://semowomeso.onlinewebshop.net/absceso_hepatico_piogeno_pediatria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6fb79b6-9422-4525-af69-a9358a7bd60f/my_cloud_home_iphone_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d929b2a-f420-4512-a15f-b1fb9b9f9de8/woodcock_johnson_iv_test_of_achievement_scoring.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_off00012235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12235 5304 bytes
SHA-256: 85013a944f417e1f01786a20e1b1552830052acb6ccd831141e0d0684e50b114
font_01_sfnt_off0001344b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1344B 11756 bytes
SHA-256: 735c3bf91dbaa465bb8116984a549647d7e68a102d9f2378c65677f54fa28eb2