Malicious PDF — malware analysis report

Static analysis result for SHA-256 93f1a1f4174e6c2f…

MALICIOUS

PDF

107.2 KB Created: 2021-04-20 16:04:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: ade8a8f68655a45ead86e184d4f352d5 SHA-1: 20ceba813f963864a7e113c9598f77f1f0e00e19 SHA-256: 93f1a1f4174e6c2ff57effdee77f812416aa413f7e8b00c4f350a14000e83d3e
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/strik?utm_term=sda+bible+commentary+books'. This indicates the document's primary purpose is to lure the user to this external site. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/strik?utm_term=sda+bible+commentary+books In PDF document text
    • http://kisedevobale.22web.org/18636725382.pdfIn PDF document text
    • http://dasezin.getenjoyment.net/how_full_is_your_bucket_spanish.pdfIn PDF document text
    • http://kidobujugi.mypressonline.com/britannica_encyclopedia_2020.pdfIn PDF document text
    • http://mazezoda.22web.org/vafof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/informazioni_sul_cammino_di_santiago_organizzazione_costi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c8c0eb4-3caf-4045-91f3-0d19d4298290/mulifasibijuwijufex.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/flower_embroidery_designs.pdfIn PDF document text
    • http://mifofoxidil.onlinewebshop.net/introduction_to_statistical_learning_stanford.pdfIn PDF document text
    • http://dizepeliw.epizy.com/45321661.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/87324205834.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/how_to_stop_brother_printer_from_going_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/autocad_2015_tutorial_video_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2873885-f2b2-44b6-a9d6-d9b91c3bc268/44392434123.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/dabeleromoxesisezaju.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/sap_fico_tutorial_for_beginners_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/90989368778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc6204d4-a2e4-4314-8358-167a4257a51a/11480355540.pdfIn PDF document text
    • http://tedizixulore.epizy.com/journal_international_risk_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08b18fb9-8257-4ab7-a317-4a8f0a5064d5/how_much_do_cal_spas_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/contract_pilot_agreement.pdfIn PDF document text
    • http://fudipakuvile.epizy.com/31685751842.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/375722f8-750d-4f4e-80f6-c1c8f25ff8b3/pisakiluxarapatakefenujaw.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_off000166c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166C1 5496 bytes
SHA-256: 475ec69c30a54aef01dee1d380da3c6b8013155334e5cb032b4faec998cebb89
font_01_sfnt_off0001795f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1795F 11096 bytes
SHA-256: d635c01deac7366bf9022abfa865028b524bc55fec8044f3b355906f84daf0af

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