Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c4b70d0c9eef30c…

MALICIOUS

PDF

695.8 KB Created: 2021-05-23 10:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 874ccab048ceb3a630d486aa34d44aa5 SHA-1: 3d0f8dd5500665b8a0144b64432a366a70897dfe SHA-256: 1c4b70d0c9eef30c17b221122afb1b214d44782cfbb9759b279c39e4af176e4a
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit users through deceptive content, possibly leading to further malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8021

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://leonvi.ru/strik?utm_term=prepare+chart+displaying+volume+of+irregular+shapes+using+concept+of+integration PDF link annotation
    • https://wixinuwexe.weebly.com/uploads/1/3/0/7/130739185/fixob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489247/normal_605c75728ed97.pdfIn PDF document text
    • https://kupafejesuxab.weebly.com/uploads/1/3/4/6/134650707/bafdf335aa022.pdfIn PDF document text
    • https://bezubimuxidisa.weebly.com/uploads/1/3/1/4/131453869/4787174.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494668/normal_5ffce48748329.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376126/normal_6062298f48f4f.pdfIn PDF document text
    • https://zuwubusonelab.weebly.com/uploads/1/3/0/7/130739898/paxopifirorefevojek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_602ce9d0abea4.pdfIn PDF document text
    • https://ribugasa.weebly.com/uploads/1/3/6/0/136053023/wulinafipasit_mapitewukeziwul_durabojijil_gijipaxer.pdfIn PDF document text
    • https://kumazapo.weebly.com/uploads/1/3/2/7/132710765/8b0cf6f391541.pdfIn PDF document text
    • https://mubujibazakob.weebly.com/uploads/1/3/3/9/133986275/6401026.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372737/normal_605f5320f1f0a.pdfIn PDF document text
    • https://nezubarenegutel.weebly.com/uploads/1/3/0/7/130776328/e3f6fe4654f1.pdfIn PDF document text
    • https://pidakulosa.weebly.com/uploads/1/3/4/3/134391257/xubujomi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/lezugijawujub.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/bill_of_exchange_definition_in_urdu_language.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07fbb3a2-0fa6-4f57-9b81-71d56253557f/170043399.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fbd64eb-1701-412e-8aba-cba2adcbd712/what_is_communicative_purpose_of_explanation_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2684f6ae-fd8b-4f38-8841-9a0ea1e221f0/how_to_get_the_post_office_to_hold_my_mail.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e4fb5ed-7050-48c1-b6a6-e273220ac6eb/qu_es_una_metafora_y_ejemplos_para_nios.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000a7b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7B32 5616 bytes
SHA-256: badef213a40d7a92e83b6632b235efd946736171a763421277c40554119356ff
font_01_sfnt_off000a8e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8E2B 13356 bytes
SHA-256: eae2ed769df6e412f5fd404f7e5f5398f3e6cff4f0e786768190aadc7c41a27b
font_02_sfnt_off000abaa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABAA9 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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