Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe136d8c2b0a1eb0…

MALICIOUS

PDF

72.1 KB Created: 2021-03-12 15:58:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1acfaa9499249e6262b7fe4b9d64acaa SHA-1: ee4acb27a8d0ed25b95706f257674773801a0650 SHA-256: fe136d8c2b0a1eb09653a70d7eae57cb1157ecb980c104756a5c5ee06cab362d
104 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, with a specific detection name indicating it is a phishing trojan. The document body, though heavily obfuscated, contains references to 'Bridging visa form australia' and 'action required within 24 hours', suggesting a phishing lure. An external URI pointing to 'fokemale.ru' was extracted, which is likely the malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/123?utm_term=bridging+visa+form+australia PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420468/normal_5ffbbde2e5bee.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/3giGgjL/air_force_fighter_jets_vietnam.pdfIn PDF document text
    • https://cdn.sqhk.co/somepizeko/jggihej/57525775527.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/hKYwidT/premiere_pro_photo_collage_template_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486748/normal_5fd77ffcc5e26.pdfIn PDF document text
    • https://cdn.sqhk.co/xurajalijok/ekQuegi/gravity_blanket_vs_other_weighted_blankets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445544/normal_5fd674d1a6f64.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/jizubisetebof/acromial_extremity_of_clavicle_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9afc53f-4a2d-482c-814a-635cbbfdfbcf/behavioral_neuroscience_8th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f247bc9a-5cdf-4464-b6dc-f62d1873db7f/saga_rules_1st_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d017f4f-0563-4a02-8b99-c6f00d541796/what_types_of_intermolecular_forces_are_found_in_ccl4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/753f6931-021f-4fe8-92df-fd60faa495f0/marriott_employee_benefits_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32ff655e-1e1a-4981-99c6-ff32e3b7dec5/24253660910.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/asurion_affidavit_sprint_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/romopatiguvegivovapomosuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10117a69-5d8d-43e0-a7c0-e89ce1dff168/lights_out_game_3x3.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/71732695696.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/hanuman_ji_songs_dj.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/pusugo.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_off0000ddf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF5 5336 bytes
SHA-256: c7ce4d3b5deebcd8b007b9ae0aae1b423c944e521c76a8e4ad5664fd3ff9080f
font_01_sfnt_off0000f017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF017 10384 bytes
SHA-256: c0a5727a4d66b8e6da7bd5dc5a4f37d7916885c4c1a0cc5ad22da72d966514c5

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