Malicious PDF — malware analysis report

Static analysis result for SHA-256 59fd5415f0d8d9ee…

MALICIOUS

PDF

75.5 KB Created: 2021-01-25 13:45:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d7e8fe93f25f1fccdefa1ebc9fe4543e SHA-1: d0d38ab1fd5a1f0ae85eecc85967b5f4d9c99afb SHA-256: 59fd5415f0d8d9eeef48f1aeb5c0ee80d5ce9728967f3ff77a3c6910acf4ed0d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many pointing to benign-looking PDF documents, but one prominent link to 'traffnew.ru' suggests a phishing or malware distribution attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, reinforcing the idea of a link farm used for SEO manipulation or traffic redirection. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/123?utm_term=cinema+de+qualidade+baixar+filmes PDF link annotation
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/4737208.pdfIn PDF document text
    • https://fukenotaza.weebly.com/uploads/1/3/2/7/132740373/d3c260d94dceadb.pdfIn PDF document text
    • https://pufokebisuniga.weebly.com/uploads/1/3/5/3/135324869/1a0d3ad38.pdfIn PDF document text
    • https://safamitiwifiro.weebly.com/uploads/1/3/0/7/130739579/vibimijanumagefa.pdfIn PDF document text
    • https://gurawibozogudex.weebly.com/uploads/1/3/0/7/130739732/8700766.pdfIn PDF document text
    • http://art-practice.org/933181739797wkek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421199/normal_5fe6093f1528f.pdfIn PDF document text
    • http://familyit.info/tycoon_business_game_empire_business_simulator10me5.pdfIn PDF document text
    • http://bestgirl69.com/filulevenijudige9195z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380530/normal_5ff6c492c18c6.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/fadadedezeker/epidemiologia_de_insuficiencia_cardiaca_en_mexico.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/british_gypsum_board_finish_safety_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/xararalujazeratumovesixo.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/bedsheet_toga_female.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/63814988581.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/dobelulapinijupuwidol.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/opencv_edge_detection_android.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/rizizipuvexelapebez.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_off0000e780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE780 5292 bytes
SHA-256: 6f6e40a421bbd59442348c4ce9096aef6a01f5caa16d12380f6a62564d85623f
font_01_sfnt_off0000f95c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95C 12284 bytes
SHA-256: 712ab402a0089541cc2ce8557490fce0d41b2f9874cec657f616ddfe3b3c45aa

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