Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad6249c29928d26e…

MALICIOUS

PDF

78.1 KB Created: 2021-03-24 20:45:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a5f58464ff15fbb54414320d5173e2ce SHA-1: 2fd67cbff6249c1a51ecace896c4679ce7f26da2 SHA-256: ad6249c29928d26e07dc8f46ff3b0f56971664705bc0584a8820e9eb5a69744a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/strik?utm_term=the+wife+movie+storyline PDF link annotation
    • https://cdn.sqhk.co/lumolixuwo/giBgiU3/space_wolf_mobile_game_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/tukawezezo/Xg7odW0/second_hand_clothes_app_netherlands.pdfIn PDF document text
    • http://wonozudobitisog.scienceontheweb.net/toyota_production_system_book.pdfIn PDF document text
    • https://gaduforijap.weebly.com/uploads/1/3/1/3/131381464/towuparikaditud_maxiribevige.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/best_stock_for_2020_reddit.pdfIn PDF document text
    • https://renobikedasel.weebly.com/uploads/1/3/4/8/134897329/2999c579a4067.pdfIn PDF document text
    • https://cdn.sqhk.co/nedivixozu/hrMlxgg/mimpi_hamil_anak_kembar_artinya_apa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f52a3982-fc71-426d-a0a1-04b4c76a1722/86623098891.pdfIn PDF document text
    • http://soranodabiwegi.myartsonline.com/juwib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84883bba-4c20-4d12-bf28-9ec7ff163967/janexago.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/zugabifamitov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d8f0f4b-ab8f-4d8e-bd7f-066c1bed85ea/falilisevexozuwutapexegup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32de4296-de86-456a-87d0-f84a0317785d/98692435834.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/nts_kp_tevta_application_form_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/the_captives_2001_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/mimob.pdfIn PDF document text
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_5bd4e26144eb4904ba14edafe9705b54.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb7debdb-1399-489a-9380-dc69862d8600/what_is_the_average_salary_of_a_compliance_officer.pdfIn PDF document text
    • http://ruzakema.onlinewebshop.net/90459126153.pdfIn PDF document text
    • http://gulagopafed.onlinewebshop.net/best_ereader_for_2020.pdfIn PDF document text
    • https://56148a0a-83a3-4003-94ff-78d3044b7c00.filesusr.com/ugd/6f5f23_39a57643968e48a2a1429b5d6f158034.pdf?index=trueIn 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_off0000f191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF191 5000 bytes
SHA-256: 78b9a8be84de1878553781693390bc80fbbf71b1f18aa91062af15f7530532a0
font_01_sfnt_off00010289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10289 11524 bytes
SHA-256: dcaf33f37a2dc99c910783eee6b191469aeec9557048d21059095feae0fcebc9

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