Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ad2f5fe53d7e5b…

MALICIOUS

PDF

77.6 KB Created: 2021-03-24 01:20:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 335fb21cef8596bb0d12dcb2c74d8a64 SHA-1: 8e2539305baf16471f8d2005dc2e98f10ed9a4a5 SHA-256: e8ad2f5fe53d7e5bcc98b7bdcbdd42b359781a97cc2439d42501605296c72027
126 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 by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting or domains associated with link farms. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, aiming to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/award?keyword=complete+book+of+amulets+and+talismans+pdf PDF link annotation
    • http://tetiviguxawik.getenjoyment.net/porunonisugazaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428054/normal_6048c0e690b2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501962/normal_605a67c8d794a.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/7hbgjbO/gexomilobavisuwew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426262/normal_603b26bf396c8.pdfIn PDF document text
    • http://pobadabodoz.scienceontheweb.net/victoria_secret_newsletter_sign_up.pdfIn PDF document text
    • http://rte-ita.fun/english_reading_comprehension_for_grade_17tx3l.pdfIn PDF document text
    • http://epaytds.xyz/73559716963kpl81.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/37999884035.pdfIn PDF document text
    • http://websporizle4.com/brand_guideline_template_freedq769.pdfIn PDF document text
    • https://cdn.sqhk.co/pijovowifil/es3tie1/best_rock_ringtones_mp3_free_download.pdfIn PDF document text
    • http://gaxesujite.medianewsonline.com/jinaralowobofakoxevurupeg.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
    • https://uploads.strikinglycdn.com/files/78bc58f4-2918-4e84-a0e0-8e041adeb76c/40750254578.pdfIn PDF document text
    • http://siberasule.rf.gd/kogodanubijitinidevosun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b70ac5a-2a27-43d8-a7e2-ff5138fe3c28/78500374924.pdfIn PDF document text
    • http://lamuverifob.epizy.com/vinyl_sheet_flooring_store_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1591e8fe-888f-4229-89b6-086064839f6f/how_to_draw_a_light_fury_step_by_step.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc95b9e6-0fd6-4613-a935-44591ec91022/does_bose_make_901_speakers_anymore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffb60b5a-a300-4df9-aadd-c2e94c4df0f0/are_polar_bears_going_extinct.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE355 5200 bytes
SHA-256: f5462ad7f45018e6b9843b0d57653ddb572b7d7db281d60a1e343a706a14bb21
font_01_sfnt_off0000f4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EE 11216 bytes
SHA-256: c8039fc047b5bf04f7dad1db62b2195ec7e8cc827e7e7d0f218c91aeb3f44f88
font_02_sfnt_off00011ac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC4 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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