Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b4dcdde35ff93a5…

MALICIOUS

PDF

75.3 KB Created: 2021-05-06 08:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8e44611c471465a4a9fef242761ccbcd SHA-1: 265293fcb70cb9c9cc29a54bf172e24f8a7f3ab0 SHA-256: 4b4dcdde35ff93a5ea802e90e3307edcd6701490e26ec02c0cbbead9b7ee5106
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL pointing to 'gimoguvi.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'Mcgraw hill education' and 'wkhtmltopdf', suggesting a lure to disguise malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/strik?utm_term=mcgraw+hill+education PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454995/normal_5fce7553c04e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368955/normal_6019485a5e278.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/pathogenesis_of_peptic_ulcer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489411/normal_604b206e27c2d.pdfIn PDF document text
    • http://mudixefibewab.mywebcommunity.org/bls_acls_aha.pdfIn PDF document text
    • http://pakizimavom.scienceontheweb.net/adjectives_list_english_spanish.pdfIn PDF document text
    • http://nosatines.mypressonline.com/ripeverezugopoxiwo.pdfIn PDF document text
    • http://wanididezaj.getenjoyment.net/soxesidofobarijimubove.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/piwupevivotixi/kogiguvimo.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/expanding_and_condensing_logarithms_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/paint_to_ms_word_converter.pdfIn PDF document text
    • http://solejow.myartsonline.com/how_to_create_edit_profile_page_in_wordpress.pdfIn PDF document text
    • http://vewawisu.onlinewebshop.net/zoparinideluri.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/inverse_function_examples_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/89064586158.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/el_pollo_loco_double_chicken_avocado_salad_ingredients.pdfIn PDF document text
    • http://vugikalijuboxo.epizy.com/jifufodujugagiwasazod.pdfIn PDF document text
    • http://pidodexogejax.myartsonline.com/12957976153.pdfIn PDF document text
    • http://pevunezix.epizy.com/zelakewetedebimezotoralim.pdfIn PDF document text
    • http://naranosufok.atwebpages.com/vu_de_droite_alain_de_benoist.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD335 5120 bytes
SHA-256: 5dfd55833d00edd22ddcd458ab364d0029d62700b8b97253f552261e79edd48e
font_01_sfnt_off0000e4b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B7 11128 bytes
SHA-256: c6199defad7a062772c903e5af42aa7b59acd42507e4a1d1a0e3251a441dfd57
font_02_sfnt_off00010ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE0 16172 bytes
SHA-256: d6b22a3af5de17498c24f972fbc9500047da5cf9ea19c32be09581fc76eaa380

Open this report in the interactive analyzer, or submit your own file for analysis.