Malicious PDF — malware analysis report

Static analysis result for SHA-256 57f81725785d5b69…

MALICIOUS

PDF

77.6 KB Created: 2021-05-30 21:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 566ef0fa793d0bfb7b038ce11928b1c4 SHA-1: 31bb4e0a37f134dbd49371f19e51482e23917ed5 SHA-256: 57f81725785d5b69cd2b748cdc5532a47eb76d952999751965082b0f155d2fbc
124 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the presence of an external URI and a lure related to urgency and callback phishing. The embedded URL, https://midufefew.ru/strik?utm_term=what+is+legal+order+lts+bank+of+america, is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/strik?utm_term=what+is+legal+order+lts+bank+of+america PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4468812/normal_5fe9559795c29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382420/normal_5ff2c3d09c986.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393190/normal_606a5553adee2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/40ff7016-6c03-496c-9c0c-bb1080b6d399/40440223544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac521d8a-36d1-4a75-b09f-dbd4c82697ab/werixomijefalusawajutivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1a2e724-1384-4843-850b-7b16e724d5f3/physics_questions_and_answers_for_class_9_cbse_motion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/862d9884-fb87-4a5b-a137-b2e102c14ab7/prepositional_phrase_worksheets_5th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a1bef83-6d23-4432-b827-fde3a2f6803b/wanavisikomigukikazuve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2302a4b-17e8-4212-bc21-ce4430efd9f1/cant_connect_to_swann_cameras.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9aaea39b-c642-42cc-8e3a-35d5da034737/bevekafuwinivubodanawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a556236-242e-49e9-9486-3b1176bc4702/aroma_rice_cooker_model_arc-914sbd_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e35ec096-62c4-4331-b94c-90dec1bf82b7/ampli_fender_mustang_iii_v2_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6942d773-e0dc-42a9-8431-e0f21c262197/vilaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97fd36b8-63ee-4630-82b8-bce0927604ba/fasadoteveziboroduxap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef515d37-dc36-4a00-aa50-9e7227848417/how_much_does_a_small_square_bale_of_hay_weigh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/703ff0f7-7c59-4915-8966-59d7b078e43c/sajetobogawivejamubibo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72358ca5-a056-41f7-8ee5-4a20f4f701ee/womaromaxojanutexuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b449edf3-bcae-4ccc-91a7-cb7dd369a24d/el_llano_en_llamas_juan_rulfo_completo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbde9439-4fc6-4d3b-aecc-70a9d866e62a/what_is_critical_condition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/440b9d22-94d7-4b89-8a6b-5f9bd862daae/p90x_weight_loss_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4fd4a7b-18c5-4cab-a70b-ab264716e52b/all_souls_catholic_church_overland_mo_bulletin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b66d895-a330-4456-9501-122ab0419a88/54893162879.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50500292-abe5-454f-bd4a-138f58432863/tavuneboxojexupodanag.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_off0000f0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C5 5652 bytes
SHA-256: a0522ed399541bd4de481e564f05a6860fdfadde6f138f22e563086a7b6dee97
font_01_sfnt_off000103e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E1 10820 bytes
SHA-256: 6adff9bcf61d090903a29ef343bb6c0331d55faf58652edea64eaa9ea5e6fa55

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