Malicious PDF — malware analysis report

Static analysis result for SHA-256 1881e89f80da7859…

MALICIOUS

PDF

73.6 KB Created: 2021-03-24 08:35:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 724a736996a499735dffee13f881d08a SHA-1: 1e576bc6e14974cf21bdc0b65dc277d75e96ddee SHA-256: 1881e89f80da7859ccc2cab4f4d7afa817a727c86e7de5371ebd488cc58a296d
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site or download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to 'great wall of china history pdf', which is a common tactic to entice users to click malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/award?keyword=great+wall+of+china+history+pdf PDF link annotation
    • http://fabujisaw.mygamesonline.org/using_the_borsuk_ulam_theorem.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/what_causes_delayed_gastric_emptying_in_infants.pdfIn PDF document text
    • http://tujijamutibe.sportsontheweb.net/ararib_plus_histria_6_ano.pdfIn PDF document text
    • http://dabutaxezopis.iblogger.org/charlotte_hornets_schedule.pdfIn PDF document text
    • http://juvizex.sportsontheweb.net/lonawekisipajoge.pdfIn PDF document text
    • http://fanuvazav.scienceontheweb.net/lepenuliguwibiga.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/fidefofudi/tumetupo.pdfIn PDF document text
    • http://fadirekobesi.rf.gd/38569050596.pdfIn PDF document text
    • http://zanevijid.epizy.com/xigalajojariwokubuvug.pdfIn PDF document text
    • http://tutapivemaki.rf.gd/sample_inventory_report_format_in_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/ranesusisewajimuraninozib.pdfIn PDF document text
    • http://dakovemusurevo.epizy.com/applied_finite_element_analysis_with_solidworks_simulation_2017.pdfIn PDF document text
    • http://malakevuxe.epizy.com/tubemunukoxoselalapak.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/naruto_blazing_ninja_road_20_guide.pdfIn PDF document text
    • http://guseboses.atwebpages.com/organic_chemistry_2_lecture_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/zurevatujizaxo.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/dog_bites_treatment_guidelines_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/auto_format_code_intellij_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/forces_and_energy_study_guide.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e22e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22E 5468 bytes
SHA-256: 1c771778585f578cd605697250061098580ef7ab7174aefdd2a98f1b745d32a1
font_01_sfnt_off0000f4db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DB 10972 bytes
SHA-256: 884859fab91c8e56e7d8a9d7b3aca4da6b1be627c42a2cf9cc4aff8fd915e3cc

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