Malicious PDF — malware analysis report

Static analysis result for SHA-256 4546df6d06cc52e9…

MALICIOUS

PDF

613.0 KB Created: 2021-04-11 23:24:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6ca226e790bb9374e088a40c46d20a86 SHA-1: 5b521335fa24cffe0348bc1ec6567a3eaa689d28 SHA-256: 4546df6d06cc52e9a58810a232f10316cabf4b5e5718df590121c26bbd95b4f5
74 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. It contains an embedded URI pointing to 'https://xajibur.ru/strik?utm_term=introduction+to+operations+research+hillier+website', which is a strong indicator of a phishing or malware distribution attempt. The heuristic 'SE_DOWNLOAD_BUTTON' further suggests a lure to trick the user into interacting with the document, likely by clicking the embedded link.

Machine Learning

  • Nyx PDF Classifier clean score 0.1053

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xajibur.ru/strik?utm_term=introduction+to+operations+research+hillier+website PDF link annotation
    • https://cdn.sqhk.co/gidurekigov/gRgigcl/44859229903.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/hjuaiap/bonulusakolugibu.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/jigji42/manizuluz.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/rdgihi0/eye_color_changer_color_studio.pdfIn PDF document text
    • http://lorakuze.sportsontheweb.net/norton_anthology_of_short_fiction_download.pdfIn PDF document text
    • http://riwozizedilar.mygamesonline.org/vepiroxisurinobe.pdfIn PDF document text
    • https://cdn.sqhk.co/xaduwudixum/jigejgs/climbing_hammers_for_sale_in_pakistan.pdfIn PDF document text
    • http://dosutomek.iblogger.org/function_of_commercial_law.pdfIn PDF document text
    • http://wavapivanuf.scienceontheweb.net/is_newsmax_tv_free.pdfIn PDF document text
    • https://cdn.sqhk.co/sugutomipu/jghEian/togesalekufapa.pdfIn PDF document text
    • http://rakakap.iblogger.org/genestealer_cult_codex_8th.pdfIn PDF document text
    • https://cdn.sqhk.co/pawekenu/bKibRoT/76384861025.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.orgThisIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf66dbda-c029-4705-9d0e-261efb8287c5/who_is_the_creepy_man_in_geralds_game.pdfIn PDF document text
    • http://kakoxoduruze.epizy.com/hindu_marriage_biodata_format_download.pdfIn PDF document text
    • http://worudaparupun.epizy.com/reviews_of_brother_label_makers_use_ink.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90d803ff-0f26-40ae-a853-6934d01e2b50/43603492132.pdfIn PDF document text
    • http://tirigofov.atwebpages.com/4440465337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e11a55f-388e-4154-9cb7-90653236d86a/facebook_saved_collections_public.pdfIn PDF document text
    • http://dupofax.rf.gd/cover_letter_template_for_cv_ireland.pdfIn PDF document text
    • http://liduzanakisuta.rf.gd/articulate_quizmaker_templates_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab161819-87da-41b5-a483-161922274827/en_que_consiste_el_modo_de_produccion_economia_mixta.pdfIn PDF document text
    • http://pipiwilevo.rf.gd/oral_b_5000_cheapest_price.pdfIn PDF document text
    • http://sokutuwinal.epizy.com/7945737558.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bf88832-588f-4e26-8744-37acac7c6a65/rivobi.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://scripts.sil.org/In PDF document text
    • http://scripts.sil.org/OFLAbyssinicaIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 10

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0008bd7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD7A 6780 bytes
SHA-256: 1cb44c361875241a391e3360096243b851333c3dee7cc93d8f2cf55de1ba4bef
font_01_sfnt_off0008ce82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE82 4660 bytes
SHA-256: df019d910c51eb6e0ab5b04d7f44fc806767ca0e179e7e05c580cefdb9e9cad5
font_02_sfnt_off0008ded6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DED6 5332 bytes
SHA-256: 60b2b40c50487ab5a11675fc71eeaa3b70932d39bda2ccaaf50c0d27acaba97a
font_03_sfnt_off0008f102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F102 20992 bytes
SHA-256: c4c455ee0e43fc3c0f8f268a2481cce22c6309bee7f84aa609423c70cc2763e9
font_04_sfnt_off00091110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91110 1188 bytes
SHA-256: 89e6e08d386abbf2b678b7644118396d88708c12431c152aa4bf257b5f7d6aaa
font_05_sfnt_off000917ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x917EC 2428 bytes
SHA-256: d613a1611f4c0b9160bff3311dfaabeea3d31d55f1bb47b0c5081bae24e2509b
font_06_sfnt_off00092213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92213 1908 bytes
SHA-256: 542e9adbcbd8c2d12280bffe2b86e2d483e25737d2a56392bac1d94d177c7a32
font_07_sfnt_off00092ae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92AE2 13352 bytes
SHA-256: 8682bb5320fa76e1fa9facb0875202c2b66b12bb3ab13a039102676db5d75769
font_08_sfnt_off00095796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95796 16732 bytes
SHA-256: f6a675af50cbc4deeb49a1796612f4fddd3138a439835d5506dcdb84494de9d1
font_09_sfnt_off00096f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96F1B 6076 bytes
SHA-256: 820851b731abc509e86fd424ecb961d9d709cc5bf8777c35c00b4009ecb0103c

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