Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4007f4d5679109b…

MALICIOUS

PDF

82.2 KB Created: 2021-04-18 14:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6d83899fc2bce4f7db19fc62499aafb8 SHA-1: 1185d1717461a5ad227ca9b85a58b43018b65e8b SHA-256: c4007f4d5679109b9e32f630ae11c811d0ba77ff85746fff9cbfc98c97f76742
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI that points to a suspicious domain, identified by ClamAV as a phishing trojan. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to 'Bible concordance' and the wkhtmltopdf application, suggesting a lure to disguise the malicious intent of directing the user to the external URL.

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://jottigo.ru/strik?utm_term=bible+concordance+strongs PDF link annotation
    • http://ppl-nutrshopfit.website/36956097962cmx2v.pdfIn PDF document text
    • http://zuvalasit.mypressonline.com/38476986932.pdfIn PDF document text
    • http://zijozarub.mygamesonline.org/jawevuzaboxudazal.pdfIn PDF document text
    • http://tihefers.online/dufibogdnee2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386330/normal_5ff49c1569f7a.pdfIn PDF document text
    • http://wasegulom.mygamesonline.org/writing_technical_documentation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369324/normal_5fd6c467c365e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492275/normal_605be3b34d3a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369503/normal_5fd831f63d7c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/nururizatuzixosowap.pdfIn PDF document text
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_f012edbf99f84edb9b43599113afdab3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/garorowa/cuisinart_fondue_set_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/kesekubipuguwafam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3d5d4ae-5c77-4b1c-a5ae-fa53c3294d84/medoxijeluwekuwekofedot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16c2db84-e2bb-4771-a23b-8a09d9f5ee0d/werepafo.pdfIn PDF document text
    • https://de461234-8179-4892-b46d-67dc01ae00af.filesusr.com/ugd/69bbc5_6441a5f47eee47f3a523b14f0da8d118.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/36264821-c8f4-4716-85de-317673bbfd1a/5870365588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87f00f55-d496-496d-8056-6561a05946f8/how_to_connect_new_iphone_to_network.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1473bc3d-c19f-4a5c-9ee0-e83824c270b1/2018_honda_civic_cvt_maintenance_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/19756614363.pdfIn PDF document text
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_81824e66ab1c4e7e8310a5975cd8657a.pdf?index=trueIn 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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1B 5296 bytes
SHA-256: f8947ef04438fc88f50b62a8ed6e88ae4087a6f8d80a397775ab7ccce2320691
font_01_sfnt_off0001011a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011A 7456 bytes
SHA-256: 8b4613244a106b9e3f0b3b1b4e7b7068aa870aba6e6fb4ca27d5b4388e740eaf
font_02_sfnt_off00011597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11597 11092 bytes
SHA-256: 6e2f73537ccaa73fd135e5bcc14480d4d4f0ad0313eb4ede529d95a3cd191d50

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