Malicious PDF — malware analysis report

Static analysis result for SHA-256 d66f2fd72ea46107…

MALICIOUS

PDF

161.6 KB Created: 2021-03-06 06:43:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3fc6f0f6b30171f2e56e8d0cc2b0587f SHA-1: 94da326ecc0d95c2412ce6907d87f9fd8a6b25e3 SHA-256: d66f2fd72ea4610777673108456c9570b5408ae5f887bdcf3f9f1c8698ef6bf5
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://zajinet.ru/123?utm_term=top+notch+fundamental+b+final+exam+pdf PDF link annotation
    • http://balegetiwep.mywebcommunity.org/jisubosetokokukizolojakit.pdfIn PDF document text
    • http://gixodugesu.medianewsonline.com/how_to_farm_engineering_materials_elite_dangerous.pdfIn PDF document text
    • http://kofodotig.sportsontheweb.net/my_cloud_ex2_ultra_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469863/normal_5ffb59f2ea00e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377662/normal_602517b8e3713.pdfIn PDF document text
    • http://lexamopelezun.mywebcommunity.org/zizonefizef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499282/normal_601748d5893a5.pdfIn PDF document text
    • http://rekijiwowak.scienceontheweb.net/pivositalub.pdfIn PDF document text
    • http://ladujose.sportsontheweb.net/59049802566.pdfIn PDF document text
    • http://xitabijasava.getenjoyment.net/aqualink_rs4_troubleshooting.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495244/normal_6015f05f518cf.pdfIn PDF document text
    • http://kufowawixapiva.sportsontheweb.net/used_starcraft_islander_boats_for_sale_in_ontario.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kimoviranonaf.onlinewebshop.net/15950349858.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f51e971-34eb-4879-a6d0-481534dca172/towadugifakiranapumak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc0cb203-bc83-4ce7-8ef9-75d5160cac44/what_is_the_best_wireless_laser_printer_for_home_use.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/information_algerie_bouteflika.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/reid_street_primary_school_darlington_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/44961894014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7003b98f-fe89-4956-ae05-6d1bc2c40a80/15178926603.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/65183674100.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22490 5280 bytes
SHA-256: b705d754626d1d4e5be2c045766e1900a930d30599b91bde8ab1f969bebb1943
font_01_sfnt_off00023664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23664 13636 bytes
SHA-256: aee47dc95a71c9b99c58352abc1df0ced701cdb7f56075520f9f5f635d63ba96
font_02_sfnt_off0002632c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2632C 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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