Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b2088d81f41287…

MALICIOUS

PDF

75.6 KB Created: 2021-02-20 04:33:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 46af0046faefca9febfd9930d3d54a1b SHA-1: b9c8cf8deb719e3444b9dedeb554e828382ce0ff SHA-256: 62b2088d81f41287de8f5ce401d3f5f3df022604bf1f21acf37e9ebe4a8281c5
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of an external URI. The embedded URL, 'https://maypoin.ru/strik?utm_term=santa+biblia+reina+valera+1909+en+audio', suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the nature of the URL point towards a common phishing lure.

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://maypoin.ru/strik?utm_term=santa+biblia+reina+valera+1909+en+audio PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409420/normal_5fd87680a34d1.pdfIn PDF document text
    • http://realwockyc.info/airtel_amazon_prime_recharge_plansou2ic.pdfIn PDF document text
    • https://cdn.sqhk.co/xolovagi/cwVfM2u/forest_green_bubble_jacket.pdfIn PDF document text
    • http://sezituza.66ghz.com/free_holiday_templates_for_flyers.pdfIn PDF document text
    • https://cdn.sqhk.co/pibexezases/58DI9ih/50521071365.pdfIn PDF document text
    • http://iceteas.space/928414603449y934.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/lerezazo/java_aptitude_questions_and_answers_indiabix.pdfIn PDF document text
    • http://duliwijedij.rf.gd/771439804.pdfIn PDF document text
    • http://lelirovosas.epizy.com/67165208515.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/mubeseluf.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/animal_crossing_new_leaf_art_guide_fake.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/68761735936.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/79738961638.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/lotosodejuv.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/autograph_songs_masstamilan._com.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_off0000e5d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D4 5292 bytes
SHA-256: 4e131e5c5eba303b08c1926da6d61f07aab7f276f0307f96018faae266f172f8
font_01_sfnt_off0000f7e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E7 12396 bytes
SHA-256: 23e393ca9265970ef8d9ec07d7b3f833a879773cf5d098e700dede5def374ed3

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