Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc5d6ff258ba2ebe…

MALICIOUS

PDF

76.5 KB Created: 2021-04-16 21:43:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a589e4e6b76bca6522222e7c1028adde SHA-1: 1000292775427a193a7ff12ec8e57b27c1143f4d SHA-256: bc5d6ff258ba2ebe4eca026bbb063ba8a0d214f9d85d98ca9ca5bebb610a92e1
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 0.9956

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://dugedepap.ru/strik?utm_term=el+principito+book+online PDF link annotation
    • https://cdn.sqhk.co/bisegepamitu/chjggij/55490276688.pdfIn PDF document text
    • http://sale50.pro/vajojivoruwiroxomiarb4q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379045/normal_60260ad6f0d4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372378/normal_601d92c627b00.pdfIn PDF document text
    • https://cdn.sqhk.co/lodoseduler/NG1tWhc/zakevilugetemulikasumepig.pdfIn PDF document text
    • http://help-igcopyright.xyz/56246992951ju6qd.pdfIn PDF document text
    • https://cdn.sqhk.co/mibuguxinise/j2K1p9a/uefa_top_scorer_2020_21.pdfIn PDF document text
    • http://espaceabone.com/190990046532wygi.pdfIn PDF document text
    • http://jotodavusugiga.iblogger.org/aviary_apk_pro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394079/normal_5fe542e57d301.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493600/normal_6023e9ecdcc62.pdfIn PDF document text
    • https://cdn.sqhk.co/zejovedelali/ghghe7S/65611687377.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459914/normal_5fdb324b2f6ed.pdfIn PDF document text
    • http://mattelipsticks.site/mecanica_vectorial_para_ingenieros_estatica_solucionarioxeuaq.pdfIn PDF document text
    • http://gufutaca5.xyz/gurney_color_and_lightaea4i.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/hjgggBR/tifeforuwalidamewafowowu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kovibu/history_of_islam_in_urdu_books_free_download.pdfIn PDF document text
    • http://gijodege.epizy.com/kexotomexomuxo.pdfIn PDF document text
    • https://d71fc03c-aea6-48f7-a990-8afffb22108d.filesusr.com/ugd/3de8a6_21d03dd865f14ee3af0820a0e3743202.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mipeboro/77690262595.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/34000235804.pdfIn PDF document text
    • http://pojafuda.rf.gd/carnosaur_book.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/does_microwave_have_a_reset_button.pdfIn PDF document text
    • http://xaminelabiz.epizy.com/silupunopulaxo.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/injury_report_ravens_chargers.pdfIn PDF document text
    • https://b2d1eea7-aef5-47fc-962c-88b5513ecafc.filesusr.com/ugd/3a57bc_67bca5f409924bc1be777988be8cb000.pdf?index=trueIn PDF document text
    • http://vitorozakosi.rf.gd/dererezelane.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_off0000ed74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED74 4700 bytes
SHA-256: e7ba5f84665679468b6e43a01cbff406507641b4c4659b4fbf3bf007579ab776
font_01_sfnt_off0000fd87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD87 10932 bytes
SHA-256: 578a0656cf50000f7128ab4fe86052aa669e33c1ffcbd1d54044d4c9c9793a8d

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