Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f71b743ec1652f…

MALICIOUS

PDF

82.3 KB Created: 2020-12-23 14:44:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: afee321f1a877e4edb148fc3089a0951 SHA-1: ce19b794c45f6305b78d4bc7277a7925c3b0da5c SHA-256: f6f71b743ec1652f0aacd602adddecfc18625fee8d11a29452549962ca78d7ea
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to PDF files hosted on file-sharing services, suggesting a link farm or redirection mechanism. One prominent URL, 'https://traffnew.ru/strik?utm_term=download+ejen+ali+emergency+mod+apk+android+1', indicates a lure for downloading an Android application. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffnew.ru/strik?utm_term=download+ejen+ali+emergency+mod+apk+android+1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379982/normal_5fd1378427ab5.pdfIn PDF document text
    • https://gitazedekof.weebly.com/uploads/1/3/1/3/131398323/7f69e527d94fd.pdfIn PDF document text
    • https://xelabuxu.weebly.com/uploads/1/3/4/2/134235382/jivuguvav.pdfIn PDF document text
    • https://bobuwazubugomu.weebly.com/uploads/1/3/4/4/134494734/dizefepanat-sofidisex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471240/normal_5fbd79a32d92d.pdfIn PDF document text
    • https://matatotasewitux.weebly.com/uploads/1/3/1/3/131384286/jejimu-wopobimalaxo-nisorafe.pdfIn PDF document text
    • https://lafivejazep.weebly.com/uploads/1/3/4/7/134771341/7992103.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453730/normal_5fa916ec17e51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390052/normal_5fa3a37541122.pdfIn PDF document text
    • https://numetoximo.weebly.com/uploads/1/3/4/7/134717633/kogawofumewese-razow.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/kasibe-mibotuwesetoz.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/2122744.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/zurovajij/hospital_and_clinical_pharmacy_book_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/70298973259.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/mekitavebotilexijezigovo.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/xiwabuvixosesajukewokip.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/deloditelopeju.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/sars_travel_logbook_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/mofajo.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/pabudamovawajudivamujuto.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/pobilesaxux.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00011993.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11993 19096 bytes
SHA-256: 96b9d55a8c7a965690c272a18cddda1542102d363b078c45938cfd7040bdc72c
font_00_sfnt_off0000cac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC3 2944 bytes
SHA-256: b315da9c493118d8e2c4753b5c3763f81960998777159ef51107ad2e8dbd1eed
font_01_sfnt_off0000d54e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54E 5600 bytes
SHA-256: e40461a668b6d459e5bbfd5d99db3dd362330bbbb858641c1f17f5b78402c70c
font_02_sfnt_off0000e873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE873 2376 bytes
SHA-256: 9e45056cb24fa8fee64b750f50df4388a7f683fcf41cc82f5c8fd04c1b9acc6a
font_03_sfnt_off0000f222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF222 11668 bytes
SHA-256: 52d13c7f7c6635748290f0a652e390f1669d81510e47165995899c5435b1d52d

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