Malicious PDF — malware analysis report

Static analysis result for SHA-256 655a39d02de41083…

MALICIOUS

PDF

157.1 KB Created: 2021-03-19 13:49:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e75c6023e08382593ff07d650305d48 SHA-1: 90b621689d234f8d7382a9361a53215868c45c91 SHA-256: 655a39d02de41083e364bd5599fcd06c73bf3700c0475c8c6db2d2941d4d8fc6
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains text that appears to be a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/wix?keyword=el+fruto+del+espiritu+versiculo
    • http://kinemulawaw.sportsontheweb.net/ribomajinugufirewepitelos.pdf
    • http://besuxiju.22web.org/safevupu.pdf
    • http://vipadobotisituz.mygamesonline.org/dd_5th_edition_classes_warlock.pdf
    • http://saburogamo.iblogger.org/48015755715.pdf
    • http://penafur.scienceontheweb.net/polaris_360_pool_cleaner_manual.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zaxuzut.atwebpages.com/74842320989.pdf
    • https://s3.amazonaws.com/fobupojowojon/rasunorijeripu.pdf
    • https://s3.amazonaws.com/mosezavor/14121557819.pdf
    • https://s3.amazonaws.com/wapabefizosumi/24001821172.pdf
    • http://wixuvixur.rf.gd/what_are_universities_looking_for_in_a_personal_statement.pdf
    • https://uploads.strikinglycdn.com/files/dbf93da4-2e03-4006-a97a-fdb3c5011b75/sevuzujedufajakolima.pdf
    • https://uploads.strikinglycdn.com/files/6433702b-453d-4a16-bd09-4dfc7a281c42/trimble_tdc600_accessories.pdf
    • http://tavoxelelenasi.onlinewebshop.net/winchester_model_12_takedown_manual.pdf
    • https://s3.amazonaws.com/tobito/openpyxl_merge_sheets.pdf
    • http://fujunaxukipasin.rf.gd/standing_calf_raise_proper_form.pdf
    • https://uploads.strikinglycdn.com/files/0fec3eec-b100-4f3d-b88d-25fb1308d89f/kujofiterarajubogob.pdf
    • https://s3.amazonaws.com/lejivugeleguwod/college_algebra_problems_with_solutions.pdf
    • https://s3.amazonaws.com/zumezeviwakiz/sapeminowadikujudenajezit.pdf
    • http://kipejefanowisu.atwebpages.com/gobodex.pdf
    • https://s3.amazonaws.com/garorowa/structure_de_la_cellule_procaryote.pdf
    • http://nifopufu.epizy.com/from_facebook_high_quality.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022a43.bin
3b1b191b6c857df6b03c4a35d56d7e2b571079ae937edac901d141356b3379ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22A43 4956 bytes
font_01_sfnt_off00023b43.bin
c351b08c6222b1890146b40cac5d0a82160d4f51b979cfb2aa9d44177949a90f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23B43 12832 bytes

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