Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6feaea5adcd40e9…

MALICIOUS

PDF

76.9 KB Created: 2021-05-01 14:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8217a26f3641b7d03ee2a8157f4268de SHA-1: 9e5e5468e2ca44294256851a4cf0ea160d1a9c0a SHA-256: d6feaea5adcd40e9ab96e5c3770de73d49da6668e731bf2027958b2eff1ed488
156 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 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 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.
  • 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://jumiwimov.ru/strik?utm_term=wolf+convection+steam+oven+reference+guide PDF link annotation
    • http://tuxesimufimiti.mypressonline.com/libodivufuminirexokufa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387817/normal_602877ae8dbca.pdfIn PDF document text
    • https://tepaxomiro.weebly.com/uploads/1/3/6/0/136019937/b6ce03.pdfIn PDF document text
    • http://newoxoxi.mywebcommunity.org/modelo_de_contrato_de_arriendo_departamento_amoblado.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470975/normal_603f679739c84.pdfIn PDF document text
    • http://vekowen.getenjoyment.net/pre_algebra_review_worksheets.pdfIn PDF document text
    • http://mumopajikex.mygamesonline.org/what_is_network_and_types_of_network.pdfIn PDF document text
    • https://jubiwaxu.weebly.com/uploads/1/3/4/6/134645567/pekopevamurezepu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374979/normal_6053280a46300.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380211/normal_601bd450820b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411480/normal_6047e9e763079.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/sizabo/kidde_nighthawk_carbon_monoxide_detector_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/tesoxakizirekilajorariwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64497985-fd6c-4109-b3d4-d14f21f6d3be/rodrick_rules_movie_script.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/ardhanari_full_movie_in_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1655715c-daed-404c-b261-e96ff2a15add/xiradogafamekenamibamo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2b75a4d-d4e8-44a2-87b6-3bad477c145c/bemujekekizolusigexobabu.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/8962494212.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2dcd33d-a8bf-43bd-9e28-7b62cfba5f9a/zepupoxumolonedul.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/fupowefepivupinodas.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_off0000f041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF041 5416 bytes
SHA-256: fc99d957103c928ba05a697d7c0f15b204830f1d2e2dc41aaea930edf90390e6
font_01_sfnt_off000102ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AB 10468 bytes
SHA-256: c1e59cf4d6b0f80991548214c1b3150192291edfe389c341080f63c0f17b0d50

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