Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9fac127927c4c77…

MALICIOUS

PDF

72.9 KB Created: 2021-04-01 21:41:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 5c864d0386f5e370bd974f7e58b93d05 SHA-1: 8473d1b1363b081be7ef4efd122ec5e7b2895f97 SHA-256: e9fac127927c4c7769013b7441af361f327beab33e78c57ac19fa85fb798255f
96 Risk Score

Malware Insights

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

The file is a PDF with a high ML classifier score and ClamAV detection, indicating malicious intent. It contains embedded URLs, some of which are marked as unknown reputation, suggesting they could be part of a malicious campaign. The document body is heavily obfuscated, but the presence of PDF_URI and EMBEDDED_URL heuristics points towards the document's function of directing users to external resources.

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 http://jokidinavefo.22web.org/xafibodesuvoriwotilu.pdf In PDF document text
    • http://dosaxixapaxa.medianewsonline.com/tepuvemejukujexoler.pdfIn PDF document text
    • https://cdn.sqhk.co/nosuterib/lGsuv2c/zoguxiven.pdfIn PDF document text
    • http://xekalabaxuv.medianewsonline.com/absolute_power_of_questioning.pdfIn PDF document text
    • http://deliwubavamir.mypressonline.com/kinovakajize.pdfIn PDF document text
    • https://cdn.sqhk.co/setuboluraje/dkHjgXr/pemozonafegevasozidudev.pdfIn PDF document text
    • http://woronari.getenjoyment.net/algebra_1_assessment_test.pdfIn PDF document text
    • https://cdn.sqhk.co/liguzalat/gccl5Hn/autodesk_autocad_certified_user_exam_answers.pdfIn PDF document text
    • http://fajamad.mypressonline.com/miller_bobcat_225g_battery_size.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/bQ3nTxENlgE/wb?keyword=ghosted%20love%20gone%20missing%20season%202%20episode%205PDF link annotation
    • https://s3.amazonaws.com/bupaxomu/simple_game_design_document_template.pdfIn PDF document text
    • http://kagomovibinat.rf.gd/8559394785.pdfIn PDF document text
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_09abf60833f24dd79ca2a4a53d8d5169.pdf?index=trueIn PDF document text
    • https://507f79ed-2408-4027-b124-45ed49bded7d.filesusr.com/ugd/2de61b_4ebc6bd3dc2348c0b3407a154e2bdada.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/17678316128.pdfIn PDF document text
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_9440afdc18c945d697d2f16a40716ea8.pdf?index=trueIn PDF document text
    • https://9849c7ec-8b19-4b81-9a64-db2537ea7c40.filesusr.com/ugd/97b1c0_a4e867cf32904c54ab53011560d4e065.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mipizaju/lapamomadenilukima.pdfIn PDF document text
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_5e2dd756f9c0471e8929a4a247f6acc0.pdf?index=trueIn PDF document text
    • https://a7193630-a032-4ee2-b136-33837135b76a.filesusr.com/ugd/fac845_a58b3d1d8ee042cf8ae0053a851bae0c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/acronis_11._5_bootable_usb.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/artificial_intelligence_books.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD51 5624 bytes
SHA-256: a4cfb3911edb0e4a32dc840480e6255bca7be469ce7dab2b0598d418ef15fabe
font_01_sfnt_off0000f05b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05B 11204 bytes
SHA-256: 06e2217c193b0d6ab9ab9cda740fc3a96f719ce8ccb27f4f9b6de66d488e5107

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