Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad8b93dfa55829fb…

MALICIOUS

PDF

74.6 KB Created: 2021-03-10 22:41:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0a549b4bc5c4ded940ca06867c358a88 SHA-1: 3ede9432fc6e21b43b306c91c17e555a8906ac26 SHA-256: ad8b93dfa55829fba72278512ff32c740652fcc2c819b0f22776b518ccf1fad2
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-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://ponafet.ru/123?utm_term=java+jre+7+update+67%2528+32-+bit%2529 PDF link annotation
    • http://aycotoro0.xyz/how_to_fix_e2_error_in_sharp_washing_machine4njfy.pdfIn PDF document text
    • http://masajsalonunuz.com/honeywell_radiator_heater_manualltrug.pdfIn PDF document text
    • http://justiciaforjustice.com/tiny_barbarian_dx_switchb2a1g.pdfIn PDF document text
    • https://wazelekur.weebly.com/uploads/1/3/4/3/134322050/boxivufibaw_tivuni.pdfIn PDF document text
    • https://tiledumojamusej.weebly.com/uploads/1/3/4/0/134096308/46bc49e482.pdfIn PDF document text
    • http://vitofemegawe.getenjoyment.net/33470096689.pdfIn PDF document text
    • https://komutezux.weebly.com/uploads/1/3/1/3/131398036/813a49501354a.pdfIn PDF document text
    • https://bavipakodotem.weebly.com/uploads/1/3/5/9/135958795/3059248.pdfIn PDF document text
    • http://copyrightsupporthelpcenter.com/jirakuz7e2bm.pdfIn PDF document text
    • http://ericksandoval.com/mathematical_modelling_kapurenkgk.pdfIn PDF document text
    • http://witaxolexigabi.mywebcommunity.org/xiwomobevogaka.pdfIn PDF document text
    • https://bebefezagogu.weebly.com/uploads/1/3/4/3/134372182/xubebapulukakirase.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://salilizuvozel.rf.gd/surya_bhai_mbbs_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/019bb9f1-e870-4e70-92cf-d65ae8cae87c/human_anatomy_for_artists_the_elements_of_form_eliot_goldfinger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33ed164b-6215-455f-976f-656bfc62b7ab/30100087139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48c3646d-8f51-48b6-a473-1f99aa472652/49439634979.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24f936d6-e86c-4dad-8ba0-dcf3bf3c8266/33878836902.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1f79d58-f630-4a56-a30e-7b617fc23225/midewefubaxipomago.pdfIn PDF document text
    • http://bunaziwafifa.epizy.com/what_is_kants_theory_of_knowledge.pdfIn PDF document text
    • http://sadozejeko.myartsonline.com/which_nitrogen-containing_base_is_found_in_dna_but_not_in_rna_quizlet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58f99ca6-81ba-4c1d-afe8-dc4bbfed182c/42384803759.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_off0000da99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA99 5388 bytes
SHA-256: 52be2490510a9b14f14935ef5fed7f0c0ecaf4619a7c49e415904aca4c565cca
font_01_sfnt_off0000ed1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1D 9864 bytes
SHA-256: 573ee4840436b71780487d35b1d3f54b611e1b4c2683b6424701db6c9fbea051
font_02_sfnt_off00010ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF8 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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