Malicious PDF — malware analysis report

Static analysis result for SHA-256 d72063763226a4e5…

MALICIOUS

PDF

405.7 KB Created: 2021-03-07 18:11:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 510b25aba840f471f38f20cf4f1d4e08 SHA-1: f1b08b434bb4dfe1e8e63335cd4022350769ee6d SHA-256: d72063763226a4e570bc2166ccfa3614d8cd0bd344f04c8d46b77b755699ebab
136 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a callback phishing or tech support scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. The presence of malformed streams and external URIs, coupled with a high ML classifier score and ClamAV detection, strongly suggests malicious intent. While no scripts were explicitly extracted, the document's structure and embedded URLs point towards an attempt to deceive the user into initiating contact, likely for fraudulent purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9353

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
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://midufefew.ru/wix?keyword=informatica+10.1+powercenter+designer+guide PDF link annotation
    • http://tezijexipilimo.getenjoyment.net/rokenufewagolijuwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448337/normal_601e16de7881b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445890/normal_6000484f51717.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402960/normal_5fe69217f421e.pdfIn PDF document text
    • http://pejagepelif.iblogger.org/what_are_the_ranks_of_a_sheriff.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/sat_practice_test_7_answer_sheet.pdfIn PDF document text
    • http://xobelijimuri.iblogger.org/how_do_i_reset_my_liftmaster_wall_controls.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380405/normal_5fdbabffde546.pdfIn PDF document text
    • http://lotibamuzuti.scienceontheweb.net/larousse_gran_diccionario_espaol-ingls_english-spanish.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463277/normal_602080157397f.pdfIn PDF document text
    • http://tigitaja.iblogger.org/26359985879.pdfIn PDF document text
    • http://wumijodurixemi.22web.org/2124844400.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471723/normal_602d0a8573ac2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407057/normal_5fc7d5c65c89c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420034/normal_5fc928387426d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lusuzajemofim.rf.gd/7221711823.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/millionaire_quiz_answers_finance_in_the_classroom.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/zedoz.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/comethazine_bawskee_3._5.pdfIn PDF document text
    • http://livuwiga.rf.gd/jedirano.pdfIn PDF document text
    • http://penabak.epizy.com/what_happens_in_chapter_11_of_the_giver.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/frigidaire_affinity_washer_wont_reset.pdfIn PDF document text
    • http://lizedugenok.epizy.com/is_true_to_the_game_2_out_yet.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/ford_performance_parts_near_me.pdfIn PDF document text
    • http://sixipiboronid.rf.gd/2004_dodge_ram_1500_fuel_pump_check_valve.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_off0005fc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC39 5696 bytes
SHA-256: 5f3329b820e0c8f2e319de46310f647ee42fa8beb55e35ac4462709688667341
font_01_sfnt_off00060f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F9C 17184 bytes
SHA-256: d0e0004674ca36eaf0deec6eb08a89b094717688a78c2905dcf8298d75c19990