Malicious PDF — malware analysis report

Static analysis result for SHA-256 db1025ef5fab466c…

MALICIOUS

PDF

70.9 KB Created: 2021-03-12 10:40:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 6ea6482ce9a74bd992ce7e87423560b7 SHA-1: b02b205688c21c65c490b1fe178c6940bd5ee4f2 SHA-256: db1025ef5fab466c0c4dd4336cedea8138ac80f1ebe585e88c086c7105d96419
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 a suspicious domain, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, likely contains the lure to trick the user into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=introductions+in+spanish+worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450636/normal_6002670e34b7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393624/normal_6025c0aa7bd60.pdfIn PDF document text
    • http://wijufonexomi.22web.org/61932903601.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369930/normal_6012c63b1ccf8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465263/normal_600598d76d105.pdfIn PDF document text
    • https://cdn.sqhk.co/vipabumumiw/iegcyNt/nevimin.pdfIn PDF document text
    • http://dronextactical.xyz/publix_wedding_cakes_reviewsk93fy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413012/normal_600bf16342bd4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389792/normal_5fc762e0ef07b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423460/normal_5ffaaceaaa09f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369495/normal_5ffb0d273d9b8.pdfIn PDF document text
    • http://ericksandoval.com/guides_touristiques_synonymeno10m.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxarulenogu/6igjhie/25199953103.pdfIn PDF document text
    • http://usejus.club/666523563183abe2.pdfIn PDF document text
    • http://foruzakitotilut.iblogger.org/turidodifivetizopa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380674/normal_6043552e2c34a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453537/normal_604ae7ec75e78.pdfIn PDF document text
    • https://cdn.sqhk.co/dutumutu/SidOiiT/augmented_dickey_fuller_test.pdfIn PDF document text
    • http://maska-respirator.com/mechanics_of_materials_10th_edition_solutionszivna.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sutejapikomi.epizy.com/90395981979.pdfIn PDF document text
    • http://xenuviwiduf.epizy.com/metamorfosis_de_la_mariposa_para_nios_para_colorear.pdfIn PDF document text
    • https://4fe85328-8dbf-40e9-afa8-2c8d6ff8a9c8.filesusr.com/ugd/9c0842_263c2c1390e24c3193c532705a4b027d.pdf?index=trueIn PDF document text
    • https://ebd73b9a-b255-48a5-b781-2bd84b483b4c.filesusr.com/ugd/956c05_b3547b8c53324907a590b7e84571029b.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80B 5220 bytes
SHA-256: 05ddd100e461bd5defebe867c3707afb01f8eecbf84f8970012f8ad876927786
font_01_sfnt_off0000e9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D9 10584 bytes
SHA-256: 3bf7fb8ed3d7ea75da51eb8f82ce7277256324a9e57e950302167d06cf0111db

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