Malicious PDF — malware analysis report

Static analysis result for SHA-256 695709a7c59a46c2…

MALICIOUS

PDF

79.4 KB Created: 2021-04-10 07:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a3c4f6389e2be35c3a1f1aed6ef9a266 SHA-1: 191faf3f044dd4a26d88c6afc500f11a337fa3b9 SHA-256: 695709a7c59a46c2007dac8dacc01643df3871aac1e4aea3923231a400cec423
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 0.9993

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://jottigo.ru/strik?utm_term=does+dunkin+doughnuts+serve+breakfast+all+day PDF link annotation
    • http://ruxuzosok.mywebcommunity.org/83482204959.pdfIn PDF document text
    • http://vetebozo.mypressonline.com/the_norton_anthology_of_short_fiction.pdfIn PDF document text
    • http://morasuxod.getenjoyment.net/22024773755.pdfIn PDF document text
    • http://amsidisi.xyz/the_walking_dead_nowe_odcinki_201945ffn.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/samsung_remote_bn59_user_guide0uwvt.pdfIn PDF document text
    • http://fruitnaturs.space/why_wont_my_directv_remote_turn_on_my_tvqcg4i.pdfIn PDF document text
    • http://richteam.site/cgeit_exam_sample_questions0ud3l.pdfIn PDF document text
    • http://arbitestpark.xyz/91500798707hfe1k.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/pomezarezumigifif6m31e.pdfIn PDF document text
    • http://business-open.online/dawavubojenajezezoxifln5z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dovabaz.epizy.com/66584743071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e5f1f3d-5c90-4f36-86f0-4155931bba1e/json_simple_tutorial_java.pdfIn PDF document text
    • http://vavogave.rf.gd/exam_answer_sheet_paper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1d993d2-6899-430a-9c7c-6ecf36fcac39/english_to_swahili_translation_dictionary_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a2bd437-2634-43cf-931c-740c66c503d5/36955097592.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/intermediate_microeconomics_with_calculus_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b7f1361-30ba-4805-a26c-923e214cf2b6/jlab_headphones_not_pairing.pdfIn PDF document text
    • http://kixavukuwowaz.rf.gd/1599147929.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/59288223452.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/panasonic_microwave_oven_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/nuveporanuxi.pdfIn PDF document text
    • http://kopolug.myartsonline.com/how_to_rebuild_milwaukee_18v_lithium_battery.pdfIn PDF document text
    • http://majojevonomofu.rf.gd/15390601770.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/ralituxuzijujoxizegudiga.pdfIn PDF document text
    • http://nedizilunok.myartsonline.com/4273013711.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_off0000f61c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61C 5536 bytes
SHA-256: 30920b20a2c40075351f924b8550ae16ab77518589583f9d321ec4522b665bcf
font_01_sfnt_off00010900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10900 11344 bytes
SHA-256: abbacf9636d23de07c7107b5d8a7aaffef4eece3998565c92cfa229df5b26083

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