Malicious PDF — malware analysis report

Static analysis result for SHA-256 3618b6620b2418e0…

MALICIOUS

PDF

71.2 KB Created: 2021-03-09 00:44:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8b9a2e56d3ccef0f8c2bdb92366e0e21 SHA-1: 7473418227ecae281fcad0e0b48cb909abb8b2cf SHA-256: 3618b6620b2418e0e671c109d19d38ec9d7d6426be6a2819ef366789e6ec24ab
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to a suspicious domain, which is also listed as an IOC. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, appears to be a lure related to an 'Alcatel pop 4 manual pdf', likely intended to trick users into clicking the embedded malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/award?keyword=alcatel+pop+4+manual+pdf PDF link annotation
    • http://xoziduso.mypressonline.com/colt_ar15_pistol_lower.pdfIn PDF document text
    • http://zathkatow.xyz/cat_looking_at_bird_pictures_of_a_catbirdwx5ub.pdfIn PDF document text
    • http://sunugukumota.getenjoyment.net/3500979925.pdfIn PDF document text
    • https://cdn.sqhk.co/fegukajebaj/i3heIhe/i_runner_shoes_order_form.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/friedrich_nietzsche_god_is_dead_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481055/normal_5fff1bb074531.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/acvShia/diba_true_boots_reviews.pdfIn PDF document text
    • http://wemorewabadeluz.mygamesonline.org/89506353543.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421210/normal_603cc92f2d328.pdfIn PDF document text
    • http://trysoda.club/395093602684g09u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381101/normal_60228eb7c962b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410985/normal_5fd0b164331c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392193/normal_600a9d6dc61b5.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/rewepalazamiso/mesobex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cdfa356-e47c-4827-a8fc-cef6ea145cb3/how_to_help_adhd_students_in_school.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/report_abandoned_vehicle_texas.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/28952004827.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/93287418189.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03900b94-0fe3-45fa-a82b-011ef2f30265/bayliner_boat_parts_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/ser_and_estar_present_tense_worksheet.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_off0000cd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6A 3724 bytes
SHA-256: 0bc2187513754c209a1ff1b79f120b31e782b370bd3c40d674ca37d1cde5bce0
font_01_sfnt_off0000daa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA7 5104 bytes
SHA-256: 903dc6eceb20f5d5c567ef0a06fa099774bbf8eb07aa3a930ededd3efa7f5630
font_02_sfnt_off0000ec04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC04 10272 bytes
SHA-256: c97cb795063ce821bae823a3af449d2709a85d4ecdbf78536fa1ff2dab5f0c94

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