Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c184c4fe51c167f…

MALICIOUS

PDF

91.1 KB Created: 2021-03-25 08:20:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4c0a78a5bc15b7107f9d27fc0f9585d3 SHA-1: f5196eaf5d22bb39bcfd3a49a42335e3c9c05096 SHA-256: 1c184c4fe51c167fe136248655c8de9e1d16bc5c70dc042839be0a5c478b9e62
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV also flagged this PDF as malicious. The embedded content, though heavily obfuscated, suggests an attempt to trick the user into downloading something, likely a payload, from the provided URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://dafemum.ru/award?keyword=tutorialspoint+c+programming+pdf+download In PDF document text
    • http://vipadobotisituz.mygamesonline.org/59815420859.pdfIn PDF document text
    • http://wemokeledezo.iblogger.org/is_add_worth_it.pdfIn PDF document text
    • http://nizuxep.iblogger.org/antologia_de_cuentos_clasicos.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/fulosobezur/dell_latitude_e5400_cto_base_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/wiporijosajovaburorewe.pdfIn PDF document text
    • http://dodemupisam.epizy.com/carbon_democracy_book.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/how_to_reset_casio_pcr-t500.pdfIn PDF document text
    • http://xudadadof.epizy.com/tewikulataponarolimonagu.pdfIn PDF document text
    • http://powagamojij.onlinewebshop.net/43640948452.pdfIn PDF document text
    • http://pizitibasowu.atwebpages.com/josixafunozavikuboxazawog.pdfIn PDF document text
    • http://jamiwurono.epizy.com/where_can_i_drop_off_used_clothes_for_donation.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/mens_belt_size_guide_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c10ec03-ec29-49ab-8fa9-2fd2fc22c184/kebepibavolenijewe.pdfIn PDF document text
    • http://zipemoluligera.myartsonline.com/alternity_the_lighthouse.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/80008732952.pdfIn PDF document text
    • http://muzafevabuma.rf.gd/37327999097.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/81109788940.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/insert_into_on_duplicate_key_update_performance.pdfIn PDF document text
    • http://vebavibokifoko.epizy.com/imagenomic_portraiture_free_for_cs5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8ba5ff2-b84f-4ea6-a9e0-8381c2508401/peq_15_pressure_switch.pdfIn PDF document text
    • http://keporumutiwem.epizy.com/49515642359.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/first_birthday_invitation_video_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7244b7d-6bf9-4ff4-a375-04986b70d601/zukipodajebabaret.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00013b08.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13B08 20804 bytes
SHA-256: 1de24ee9e4df670afe7cf97f31444251b9f5f348374324726cfc6450cba6d508
font_00_sfnt_off0000fcb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB9 5516 bytes
SHA-256: 240482899b5c8bb880f8b08029ec2bcc90e91a79af2f9c49f089608e32ba0a8d
font_01_sfnt_off00010f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6E 13460 bytes
SHA-256: 0101176de486b33944a24c3de4d4edbdb2b85725ea3813edbda257745216acc8

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