Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea9dbe29e62eec9c…

MALICIOUS

PDF

93.3 KB Created: 2021-04-29 08:16:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0ac982e6d1b76733407bf47149f0738d SHA-1: d99c5eeca7a369c90bdca804d4eacfdfcbedca9f SHA-256: ea9dbe29e62eec9cba8c191b475d5db2b6a5d19415c8ef884a45d9b62ab60f05
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=griffiths+quantum+mechanics+solutions+3rd+edition PDF link annotation
    • http://fobexugelego.getenjoyment.net/87915044698.pdfIn PDF document text
    • http://bukuxojunuz.mypressonline.com/fekotegove.pdfIn PDF document text
    • http://satomupudogoni.22web.org/zolig.pdfIn PDF document text
    • http://tatanip.medianewsonline.com/muvewomiguwor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469349/normal_6006f20197a8c.pdfIn PDF document text
    • http://fopokigife.mywebcommunity.org/allah_names_with_urdu_meaning.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419191/normal_5ff564cd73dcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419433/normal_603fcccf1bb54.pdfIn PDF document text
    • http://tiriruno.sportsontheweb.net/54943594283.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://bed2724e-b6a4-42c6-a365-5b2dc6a82e2f.filesusr.com/ugd/9f087b_e376a994bfaa45f8bad43feac54ea21a.pdf?index=trueIn PDF document text
    • https://ab9101c8-a046-40a0-ba79-761bab9f3367.filesusr.com/ugd/61fb7c_e061da5cd614464ab5edfbdf73739364.pdf?index=trueIn PDF document text
    • http://wegemejejo.epizy.com/briggs_and_stratton_450_series_148cc_carburetor_springs.pdfIn PDF document text
    • http://purokamutene.rf.gd/menorrhagia_treatment_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21b1d8d1-0793-4b31-9ed0-0c3a640da6b1/wusakagapejugixavak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac06740b-3866-4d47-b025-b07ee1c8732c/what_are_some_major_events_in_spains_history.pdfIn PDF document text
    • http://vefilemegukur.epizy.com/reduforolefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a45780a6-c2e0-4895-835e-9296669050ee/dometic_fantastic_vent_3350_ersatzteile.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A0 2912 bytes
SHA-256: f1585241b59a1002e627af24859d8bddc2a41f5101ead6a7a290360bc82d6b36
font_01_sfnt_off00010205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10205 5464 bytes
SHA-256: fbb777863e83cf3caab87c00ee947928013c12be9a2e9a786fa6f5001ed0e45f
font_02_sfnt_off00011466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11466 13092 bytes
SHA-256: 1bf4c0a0b5bcfec0bee44759026d9c72f3c46bcd0568f45217b4799a7f8b7d98
font_03_sfnt_off0001415d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1415D 16212 bytes
SHA-256: c06cfdf26406143ea38303314075dd62de8d0c8def02e0871814a9601d736975
font_04_sfnt_off000156af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156AF 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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