Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b633b48d1efbb91…

MALICIOUS

PDF

74.5 KB Created: 2021-05-22 18:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 536385335952f948f7a2fda3a354d01c SHA-1: a097ea7f474cd14d5b5b75088eafd128efb4a380 SHA-256: 8b633b48d1efbb91f16e37628bb415ca1b7e09c57d071342fbacfe8fc12db4eb
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'resalured.ru', which is likely intended to host a malicious payload or phishing page. The document body, though partially corrupted, suggests a lure related to educational materials to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/strik?utm_term=exercices+mesures+de+longueurs+cm1+%25C3%25A0+imprimer+gratuit PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454421/normal_5ff62d28aed0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418558/normal_6065e9e3bc166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366659/normal_605d86c8e96cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392210/normal_5fca15a694682.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402718/normal_6006a76d37067.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413865/normal_60402596628a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_6017d89b18940.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413707/normal_604f1f4d10b80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489245/normal_604f3c12841dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477864/normal_5fd9b21e9711a.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/waxapoz/algebra_1_worksheets_9th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/crochet_easy_blanket_youtube.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/48525195160.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/cell_biology_articles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddad2609-6181-4343-891e-921a4529c7aa/zafofaxinupudox.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/kalvisolai_10th_question_paper_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/77075861707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a0846c4-d5f0-41e1-810e-20a4520b35bc/2012_lexus_gx_460_off_road_review.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/what_computer_programming_language_is_most_in_demand.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_off0000e037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE037 5704 bytes
SHA-256: 643417a3929a2bd3930b70b4f33756ce2a74affa41cffdf6d0de401a263b655a
font_01_sfnt_off0000f308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF308 12044 bytes
SHA-256: a45313a612ab65767ce478bb68cf0d3b713956321829a4390e1311e3090bcadd

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