Malicious PDF — malware analysis report

Static analysis result for SHA-256 084323eaf6005e20…

MALICIOUS

PDF

74.1 KB Created: 2021-02-15 22:03:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 491370a90f785f4b7489f12dca9a46cd SHA-1: dc217749de5cef2d7f235638d684aea9206730f7 SHA-256: 084323eaf6005e20eb3e845bbff931c4ed473ca499f39a9524eded91236f76ae
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'druttle.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a social engineering attack, likely a phishing lure.

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://druttle.ru/123?utm_term=tascam+cd-450+review PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462073/normal_600aeb5260a44.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwutiro/cigjip2/victoria_sponge_cake_using_cake_flour.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/Q1kjfhc/ship_sim_2019_hack_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/gqJs2hc/dominos_pizza_near_me_home_delivery_number.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421770/normal_6008a5a30da58.pdfIn PDF document text
    • https://cdn.sqhk.co/lajojeletab/ciagxgh/22597359534.pdfIn PDF document text
    • https://cdn.sqhk.co/sadebupunen/iY5vWgo/globe_load_paypal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427526/normal_5fffb55fbb9fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445104/normal_6019267c9a666.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404753/normal_5ff232e9719c0.pdfIn PDF document text
    • http://firstsecu-paypal.com/acdsee_pro_4_freemfzge.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502817/normal_5fd0678686949.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467975/normal_600e5459cef2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447888/normal_600fca7b23fbd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387581/normal_5fffb5a8cb728.pdfIn PDF document text
    • https://cdn.sqhk.co/regavebike/aOjb2je/smithsonian_channel_app_xbox_one.pdfIn PDF document text
    • https://cdn.sqhk.co/rotogogoji/md1ujfY/28535755058.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/iECgdig/red_lobster_hours.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B2 5032 bytes
SHA-256: 63ebca688c9ee2b6f45a0779106cffae89f1fb3d7e365325328c61f867ee3741
font_01_sfnt_off0000e7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E8 11128 bytes
SHA-256: 888e7228bb1a786110fbb6401da537e3fe4e6aaaff759998e5b8f3ff7bd2d2c5
font_02_sfnt_off00010dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAB 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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