Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eab141d4c00f540…

MALICIOUS

PDF

74.2 KB Created: 2021-01-19 06:07:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 93e8c1f6a8549c38162b773d9836a05a SHA-1: 90f41262a069d2c39809a264c78d3e0d49d50bbc SHA-256: 1eab141d4c00f5406a5741a80dd52390139484a7be8f9ea96657b2e240a7bfc1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external URLs, many of which are hosted on disposable domains and utilize UTM parameters, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/123?utm_term=dart+league+shirts PDF link annotation
    • https://site-1168081.mozfiles.com/files/1168081/gold_plated_jump_rings_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505096/normal_5fdc748cd14f6.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/c7c9e1342.pdfIn PDF document text
    • http://kigowamukidiba.iblogger.org/2d_3d_video_converter_software_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495244/normal_5fd61bcc7685c.pdfIn PDF document text
    • https://xevibobi.weebly.com/uploads/1/3/4/6/134683071/wonuxozimoduda.pdfIn PDF document text
    • http://rugozuravonabib.22web.org/milady_esthetics_state_board_study_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415519/normal_5f9a2f5171db6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374189/normal_6003fa6534809.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379723/normal_5fc4de8014314.pdfIn PDF document text
    • https://site-1176697.mozfiles.com/files/1176697/bass_booster_windows_10_download.pdfIn PDF document text
    • https://site-1223593.mozfiles.com/files/1223593/deutsche_telekom_annual_report_2019.pdfIn PDF document text
    • https://site-1175154.mozfiles.com/files/1175154/zepiv.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://bubomikofar.epizy.com/netugirew.pdfIn PDF document text
    • http://pimibini.epizy.com/bake_sale_poster_template_word.pdfIn PDF document text
    • http://ginojakoli.rf.gd/lmsw_study_guide.pdfIn PDF document text
    • http://xezeruv.epizy.com/dixukozowirutex.pdfIn PDF document text
    • http://mitudosukekunif.epizy.com/1885529776.pdfIn PDF document text
    • http://kebanibaru.epizy.com/batching_plant_operation.pdfIn PDF document text
    • http://limixumijegaf.epizy.com/lolopezisufi.pdfIn PDF document text
    • http://nexopuvesoreben.epizy.com/leroridudubov.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_off0000db3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3E 4612 bytes
SHA-256: a63bebc6d841f7520a9729d952d8a6dacf2eddd9431385e2e40fb5168284a477
font_01_sfnt_off0000eb07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB07 10056 bytes
SHA-256: b942e5bf6772ab0ef1badd0494a78bf632d66a8fb573bfccd74be8c56ff78f19
font_02_sfnt_off00010d6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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