Malicious PDF — malware analysis report

Static analysis result for SHA-256 58a080c2ed31f253…

MALICIOUS

PDF

74.0 KB Created: 2021-04-06 06:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a46697863ecebb121c2b4bc9d723c7af SHA-1: 69a216f494247fa69bb08dd520304391a9654ccc SHA-256: 58a080c2ed31f2533e03cfc94fc0839522d4d1007e13f5648f74cb2e3d53b9b9
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to educational content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/award?keyword=teaching+numbers+in+english+pdf PDF link annotation
    • https://cdn.sqhk.co/luwokiseg/jhqaQg7/giwudawalaxigibosij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454289/normal_5ff01dede4986.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/hjTjOev/hockey_goalie_chest_pad_sizing_chart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380854/normal_5fdc4f9957c17.pdfIn PDF document text
    • https://cdn.sqhk.co/bolomadu/6RSgfgi/rilavozuxagima.pdfIn PDF document text
    • https://cdn.sqhk.co/wepigosogo/jgjnFsO/mejupoligozodara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372373/normal_601e8ab323dbe.pdfIn PDF document text
    • https://cdn.sqhk.co/wagomito/fhehfha/vip_access_app_for_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/polopomoset/haVPigQ/seven_dots_merge_puzzle.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452852/normal_6012c4c486aeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368481/normal_600f16fef24d7.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluniziwav/hg5Nieh/past_and_future_quotes_about_love.pdfIn PDF document text
    • https://cdn.sqhk.co/felinavaw/ELjijii/beat_craft_minecraft.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/ihaiboP/pregnancy_week_by_week_symptoms.pdfIn PDF document text
    • https://cdn.sqhk.co/padirazemi/jdidBSQ/57522568118.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jawipesus.epizy.com/definisi_politik_malaysia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6320044-bcdd-42c9-9e9b-cdf9b33404fb/65249644943.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1835e3d1-f813-4a44-ae27-b1be36d5b85d/16671945506.pdfIn PDF document text
    • http://fazozogujezeto.rf.gd/centos_7_ifconfig.pdfIn PDF document text
    • http://sawutex.rf.gd/dyson_dc41_clogged_hose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b789609a-562e-4e88-9f9b-d88a63a8a15a/netgear_wndr3400v3_n600_wireless_router.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_off0000e40b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40B 5660 bytes
SHA-256: 141af6249830dabec559ee8414a7d6b42e3e6229c4d78e8bed5b1d46ac53d7ef
font_01_sfnt_off0000f714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF714 10420 bytes
SHA-256: a93c1ede210d3f580f22301b4efed35a554f32204a3f4fcb831ae7d505eb523e

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