Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9469ea1df099573…

MALICIOUS

PDF

95.6 KB Created: 2021-03-15 23:58:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 38cce1ba24c0fdb309d77d55ec7779da SHA-1: 184d3d99bac4f1b718b518d1b492b393dd1bce8d SHA-256: d9469ea1df099573a4e1908c28a07f90e2baaf5cba171bfd701fdd9624a205ae
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 0.9996

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://fokemale.ru/strik?utm_term=does+mazda+cx+9+come+with+remote+start PDF link annotation
    • http://vazamewugox.22web.org/los_evangelios_apocrifos.pdfIn PDF document text
    • http://malanefire.sportsontheweb.net/why_is_my_washing_machine_filling_up_with_water_when_not_in_use.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500189/normal_603e8d8979df5.pdfIn PDF document text
    • http://xosubowavenu.mypressonline.com/fake_book_piano_chords.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388041/normal_60277b0bae4ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382430/normal_6034214a8eb1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_60127b9e327fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404285/normal_6049cbb235512.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460043/normal_60371df170942.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413473/normal_604337c552804.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372355/normal_5fe32f14db61d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kubomefewofumim.atwebpages.com/jukigetenuvib.pdfIn PDF document text
    • http://pewazeje.rf.gd/portrait_drawing_guide.pdfIn PDF document text
    • http://fubavinexazixo.onlinewebshop.net/posapudovanofonemesipo.pdfIn PDF document text
    • https://0ea28b16-58c2-472d-b6be-3e97fe9b7bb6.filesusr.com/ugd/696b8a_162901e184fb436eaa12c370e2168f08.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3f4a78c-daf2-4445-9ca7-594ffd132ee7/88453819118.pdfIn PDF document text
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_ee63b1f56c6940cfb557f02341a7d767.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1e1cead-ca80-444a-8d5a-e8426e8c9203/ditiw.pdfIn PDF document text
    • http://jiwimid.epizy.com/abnormal_psychology_textbook_17th_edition.pdfIn PDF document text
    • https://98cdd5c5-c43e-49eb-9373-39517e896cbb.filesusr.com/ugd/90661f_c43972635467423aa2053d282552e50b.pdf?index=trueIn PDF document text
    • https://73af689e-4c80-4f62-99d3-7a886641ad81.filesusr.com/ugd/3b5dd9_801cf1ee120a4f10bd0a978b0badc6d5.pdf?index=trueIn PDF document text
    • http://jigobejebameg.epizy.com/how_do_currency_exchange_work.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_off00013775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13775 5512 bytes
SHA-256: 6da020e1f9d462e9d0eb4e6d69aa1164465e8e998ae7bd5848b46e159f416850
font_01_sfnt_off00014a29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A29 11288 bytes
SHA-256: ff1b504a61afe8239fe41eab1e9827c0d0dfd1f4d7435a8d4b05260250da4f2d

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