Malicious PDF — malware analysis report

Static analysis result for SHA-256 d50fdc3428338169…

MALICIOUS

PDF

83.4 KB Created: 2021-05-21 17:16:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c709c3637ee605538e9c0ade242f9f0c SHA-1: 7757487d837bb88f34d4e81ff98047eeafb2cc5f SHA-256: d50fdc3428338169b96906cc00689417ffa432883ecd9a7fcdb49f312ebe18c4
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'resalured.ru', which is highly suspicious and likely leads to a malicious or phishing site. The document body, though partially corrupted, references 'Clicker heroes save with rubies', suggesting a lure to trick users into clicking the malicious link.

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://resalured.ru/strik?utm_term=clicker+heroes+save+with+rubies
    • https://static.s123-cdn-static.com/uploads/4383923/normal_5fdd454749acd.pdf
    • https://cdn-cms.f-static.net/uploads/4382614/normal_6019a2e17e837.pdf
    • https://cdn-cms.f-static.net/uploads/4476943/normal_6035ad6d556db.pdf
    • https://static.s123-cdn-static.com/uploads/4366666/normal_6005977863da6.pdf
    • https://buporinedo.weebly.com/uploads/1/3/4/0/134041533/siragize.pdf
    • https://cdn-cms.f-static.net/uploads/4392667/normal_60644c98f3809.pdf
    • https://cdn-cms.f-static.net/uploads/4465694/normal_5fdaaf3e7b3ce.pdf
    • https://static.s123-cdn-static.com/uploads/4480187/normal_5ffa46408666e.pdf
    • https://pofekabebo.weebly.com/uploads/1/3/0/7/130739116/5054144.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f089a4a9-b0e8-465b-9e66-774332b0c75b/what_is_the_cohesion_tension_model.pdf
    • https://s3.amazonaws.com/kifutizijebuj/libreoffice_pivot_table_multiple_sheets.pdf
    • https://s3.amazonaws.com/jipowumat/alteryx_server_usage_report_error.pdf
    • https://uploads.strikinglycdn.com/files/8fb7dd20-38fa-43c9-bfba-18eb0df2a6b4/food_safety_standards_book.pdf
    • https://uploads.strikinglycdn.com/files/cefbb203-2b02-4332-bb4a-88bbaeb5a81d/how_to_catch_him_and_keep_him.pdf
    • https://s3.amazonaws.com/viboxikuz/mejamale.pdf
    • https://s3.amazonaws.com/dobikasukavu/bifafizataxobozifax.pdf
    • https://s3.amazonaws.com/xapota/foundations__best_practices_in_early_childhood_education_with_pearson_etext--acc.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb5e.bin
da3540ba39cc27f6a1543e728311d28e4a1dae5946aaffb22ab32a8266d540db
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5E 7808 bytes
font_01_sfnt_off0001062e.bin
9fe9ff69573f6675fcf7f692d08924a7e3031ce5dd01eff5038bd3814d8a2542
pdf-font-stream PDF embedded font (sfnt) at offset 0x1062E 5148 bytes
font_02_sfnt_off000117be.bin
ea38545f1c0c4f3e48334449fabb381bae13429cc9506324ac8cecde8c4f6564
pdf-font-stream PDF embedded font (sfnt) at offset 0x117BE 11348 bytes