Malicious PDF — malware analysis report

Static analysis result for SHA-256 920165365203340b…

MALICIOUS

PDF

72.9 KB Created: 2021-03-15 07:28:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7a61e8c7b84d693bcb214c65b842f83b SHA-1: f2dd4b5b38ba8400186227d4c84390119e06d6a1 SHA-256: 920165365203340b9998e2e8b8bd5bdef2cf40ad5a9240acb6f29b915d4dd312
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 0.9997

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://dafemum.ru/wix?keyword=principles+of+ecology+study+guide+answer+key PDF link annotation
    • https://tabodixab.weebly.com/uploads/1/3/4/5/134585887/sunoxuneluteso_sowituribagabe.pdfIn PDF document text
    • http://tunizunifegitof.66ghz.com/76364517598.pdfIn PDF document text
    • http://zanakodus.22web.org/export_bookmarks_brave_android.pdfIn PDF document text
    • https://towipikegogu.weebly.com/uploads/1/3/4/6/134690187/xuminoko.pdfIn PDF document text
    • http://wuxizovawolimo.22web.org/alliance_leveling_guide_classic_1-_60.pdfIn PDF document text
    • http://lezobul.medianewsonline.com/bugler_s_holiday_free.pdfIn PDF document text
    • http://golixudib.mypressonline.com/do_you_capitalize_the_names_of_degrees.pdfIn PDF document text
    • https://nurosizakudagag.weebly.com/uploads/1/3/4/6/134699554/lebesewamu.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/regovadeje/yume_nikki_guide.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/devops_for_beginners_hands-on_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/ct_child_support_guidelines_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/siglo_xix_en_espaa_6_primaria.pdfIn PDF document text
    • http://dowuvoduwitovos.atwebpages.com/duvuvigus.pdfIn PDF document text
    • http://didoruvevesipug.rf.gd/amoeba_sisters_video_recap_monohybrid_crosses_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bcfedb3-1a94-4d2c-8491-79172248ac03/84403433217.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab7ffc89-9d1b-425f-b210-3304311921ed/spring_hibernate_integration_tutorialspoint.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12d20034-e86c-476a-a1df-0ef0d6c7a247/36266271863.pdfIn PDF document text
    • http://kimanaw.epizy.com/star_wars_the_old_republic_deceived_read_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2475d3cc-dcb8-45ad-8018-ab3a754a1aea/93205436568.pdfIn PDF document text
    • http://gujalitez.epizy.com/who_will_be_the_next_finance_minister_of_canada.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_off0000df3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3D 5584 bytes
SHA-256: 3a10a9e904fec4aaddf1f6982ff8f41613575d8e1631246ecd50164cbbc6df2d
font_01_sfnt_off0000f26d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26D 10660 bytes
SHA-256: 6ded5950aebf62b541629e7b817dea32eb627c7bd6993fe897c8c78fa995afbe

Open this report in the interactive analyzer, or submit your own file for analysis.