Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5767fe99d661175…

MALICIOUS

PDF

81.8 KB Created: 2021-03-13 19:18:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7abf6056c8d2c6e50da4d4257131e342 SHA-1: d4f4ea019fddd3295d703784e6c493e1367c5174 SHA-256: e5767fe99d6611758c9427e3cebccecf250d057d359c382eef6e48ec2dad36e0
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://yafferge.ru/wix?keyword=8+ball+pool+mod+apk+anti+ban+extended+guidelines'. This URL is likely used to deliver a malicious payload or phish for credentials. The ML classifier also flagged this PDF with high confidence, indicating malicious intent. No scripts were extracted, but the presence of a malicious URL strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/wix?keyword=8+ball+pool+mod+apk+anti+ban+extended+guidelines
    • https://cdn-cms.f-static.net/uploads/4487187/normal_60151c4bd199b.pdf
    • https://cdn-cms.f-static.net/uploads/4449630/normal_6022e6931aca0.pdf
    • http://befigter.xyz/the_murder_book_examining_homiciderukbc.pdf
    • http://ing-jobs-opportunities.com/parallel_circuit_problems_worksheet_answer_key3xf5b.pdf
    • http://zigogofarotago.22web.org/16161224881.pdf
    • https://cdn.sqhk.co/jegamaxegev/XiejTgj/esl_past_simple_passive_worksheets.pdf
    • https://cdn-cms.f-static.net/uploads/4384461/normal_600b07ab1291b.pdf
    • https://cdn.sqhk.co/pojimisuso/iiihdID/ringworm_groin_rash_pictures.pdf
    • http://usesalon.xyz/does_casio_wave_ceptor_work_in_indiaggwtw.pdf
    • http://rimka.xyz/christmas_cocktail_party_invitation_template8guwd.pdf
    • https://cdn-cms.f-static.net/uploads/4403533/normal_604b5657276c4.pdf
    • https://static.s123-cdn-static.com/uploads/4376404/normal_5fee3ed7774d9.pdf
    • http://itgermany.net/marvin_gaye_hit_songsfonxo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e53c8fcc-339b-4d8f-83f6-44ddc8c6ace4.filesusr.com/ugd/1ea9c4_3a668cb9e6a84cb6b46b2d77a692f4ef.pdf?index=true
    • https://234d5d8d-19c9-4cab-a884-dd0775662658.filesusr.com/ugd/fb7225_6669e5e365054b13ad82d8d5d3f772e1.pdf?index=true
    • https://83372c7a-1065-4b07-8284-b64562b46e84.filesusr.com/ugd/035489_8b99d2f86b3e492795d12fa638616c55.pdf?index=true
    • https://uploads.strikinglycdn.com/files/13b07b00-eee2-4a1f-b1ae-7cab46114d7d/how_to_use_rowenta_pressure_iron_and_steamer.pdf
    • https://uploads.strikinglycdn.com/files/8a40bf6c-8b72-4cf6-adab-40868d867d7b/moriwapo.pdf
    • http://semevalidenod.rf.gd/99705691652.pdf
    • https://uploads.strikinglycdn.com/files/b8e9ca7f-863d-4342-9508-b94300e516d5/28948221969.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001006b.bin
359e6525d232afa949c98c981203254a359576373e7072b092e20ba09435d114		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1006B 5556 bytes
font_01_sfnt_off0001133c.bin
c448b8043bf84fe6ddb89ce521dc34b1bee637c993437ee0c5aa87062618a861		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1133C 10812 bytes

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