Malicious PDF — malware analysis report

Static analysis result for SHA-256 7227d8fc2fbb8d00…

MALICIOUS

PDF

90.7 KB Created: 2021-03-20 14:59:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 29b2dc9d633f997f828df27791172eb2 SHA-1: f282faeb2ba6711551c9ed67b85f7d1d5ef10a2e SHA-256: 7227d8fc2fbb8d00f0edb1a4363490f3d6f0537a197e76e13e7bb74f5e296879
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'golowaki.ru', which is likely a phishing or malware distribution site. The document's metadata and body text appear to be obfuscated or corrupted, but the presence of the external URI is a strong indicator of malicious intent. No scripts were extracted, but the PDF structure itself facilitated the inclusion of the malicious link.

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
  • 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://golowaki.ru/strik?utm_term=ddep08-01+chaos+in+the+city+of+splendors PDF link annotation
    • https://cdn.sqhk.co/sifalavuxozo/ghohgMt/pressure_washer_pump_parts_canada.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382627/normal_5ff70c021fdff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408348/normal_5fe955c9bf37a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406793/normal_6055cd12d09c4.pdfIn PDF document text
    • http://bajifepeselok.sportsontheweb.net/acetobacter_diazotrophicus.pdfIn PDF document text
    • https://cdn.sqhk.co/rodesedaded/AqligJo/beguxesadijazulugajuremef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427076/normal_60401bb6ec153.pdfIn PDF document text
    • https://cdn.sqhk.co/towafeniruje/5o4kM6A/68580259822.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402294/normal_603cf757ccb10.pdfIn PDF document text
    • https://cdn.sqhk.co/kewukapugino/RPwiaib/perfect_kick_2_apk_indir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476757/normal_6033393624a9f.pdfIn PDF document text
    • https://cdn.sqhk.co/retagigimusa/cjeZegi/diaphragmatic_breathing_and_anxiety_disorder.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404739/normal_600d5c498ce55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465402/normal_604d2d032b50b.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/800a7804-ee57-4a27-a5e1-0c435c4889f7/2568239753.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/samsung_xpress_c460fw_scan_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cfd0ae6-5792-4b06-bc7e-ce9b61270f83/gazulipoterizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74719a29-20b5-4a6f-8beb-cc4e674ad4eb/franklin_college_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5de37d44-0578-4293-9116-18b0a0ace8d3/solving_quadratic_equations_by_graphing_and_factoring_ppt.pdfIn PDF document text
    • http://jujobope.atwebpages.com/43645147500.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/91026385279.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32e5bf44-b7eb-4cb1-94dc-1828918cbc55/latefixozubusopikeniwuk.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_off0001205a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1205A 5764 bytes
SHA-256: 380a29ac2b1f2148bcbdc00b89f8c9d1d5961566d7deb5f6ec3f1ae8faa8e7e7
font_01_sfnt_off00013417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13417 11860 bytes
SHA-256: 8da200f831632c2def8f6e3223ae78b20b6da801b858ab78be4501370cf4986b

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