Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b5a7dd8814d7148…

MALICIOUS

PDF

134.8 KB Created: 2021-02-27 04:12:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0346531bba6d07ca3d14a54e1b286d17 SHA-1: 0cab01549b3a2c4d9c659107805f52f7c19a8b04 SHA-256: 8b5a7dd8814d714827d98ee507f0067ab71e388edff77f167d302ad93d8b8f27
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://ponafet.ru/strik', which is likely a phishing or malware distribution URL. The document body, though heavily obfuscated, suggests a lure related to a study guide, aligning with spearphishing tactics. No scripts were extracted, but the presence of external URIs indicates an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9818

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://ponafet.ru/strik?utm_term=mere+christianity+study+guide+david+grice PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387817/normal_6025a97bbd994.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470014/normal_5fc7a83ee3695.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376599/normal_6007f12858b5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379731/normal_5fc7b56bdf5cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486197/normal_5fcab8c0a92af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453551/normal_5fee4b5531de5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376870/normal_601e68bbc6ee5.pdfIn PDF document text
    • http://lemixop.iblogger.org/fedex_store_drop_off_times.pdfIn PDF document text
    • http://vazifesi.iblogger.org/78235780441.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://xikabekopugat.rf.gd/software_system_development_life_cycle.pdfIn PDF document text
    • http://begosene.epizy.com/fipexovozixafonazavig.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/capital_letters_worksheets_for_1st_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/yahoo_mail_to_outlook.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/92135845468.pdfIn PDF document text
    • http://rinubokuj.rf.gd/quotation_template_microsoft_word.pdfIn PDF document text
    • http://vilatelisoto.onlinewebshop.net/dark_souls_artorias_of_the_abyss_bosses.pdfIn PDF document text
    • http://fudinurozoxesa.rf.gd/what_is_culture_in_world_geography.pdfIn PDF document text
    • http://lulikeleweworup.epizy.com/analogy_worksheets_grade_7.pdfIn PDF document text
    • http://bubezowi.epizy.com/77481980537.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://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_off0001540a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1540A 6588 bytes
SHA-256: 6d78eba386afcf2558b2341717aec27cc21638c1ed7aa0e6a76e6179c42c444c
font_01_sfnt_off00016449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16449 3036 bytes
SHA-256: 32651ac587c7b728d6474d840c051c792e46ff887dbc85d30a8298527c9b3f74
font_02_sfnt_off00016f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F23 5108 bytes
SHA-256: dcb9bdc01264f098a8fb72e958d836a39f9017cbbcafcf573ca094c3f7534863
font_03_sfnt_off0001807a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1807A 2164 bytes
SHA-256: 09e6065fb2d6abbca5d33b91643a0caa5099eb9859e5a5c044395381951fa1aa
font_04_sfnt_off000189c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189C4 2080 bytes
SHA-256: 306c29b61f3b0a9e84e3cd82e0b00c3080f6ef9ba77439724ab23ca47c75c15f
font_05_sfnt_off00019395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19395 15428 bytes
SHA-256: 1802e0409ce7dc69bf0d68009c97b10d0feca331cf12566adf49f2f311d4468d
font_06_sfnt_off0001c691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C691 18088 bytes
SHA-256: 4999a14a2083834bd5ff3f8515914c5b0bcfd88eac1bda600bc40e7265c3cc45
font_07_sfnt_off0001e25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E25C 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
font_08_sfnt_off0001f05d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F05D 2472 bytes
SHA-256: 2536ce987b254f371e6a2d1456d1c008db7a0d103904fd2eca6a82b459f7035f
font_09_sfnt_off0001fa51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FA51 6208 bytes
SHA-256: 001e3f1ced5010041abc3aa4e72c9ceec2f39185144fe451fbc63ea697a0f0e1

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