Malicious PDF — malware analysis report

Static analysis result for SHA-256 0857dcde3a48bfeb…

MALICIOUS

PDF

133.6 KB Created: 2021-03-25 06:32:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f1688d667b25993b82ed1a344b15a9af SHA-1: dd24b634b586702848756f7908252b0adc87cdb0 SHA-256: 0857dcde3a48bfeb14af6da9f67dcb8bfd9f691b8d03bceb19b392aae9eb3820
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a "Rogue leveling guide 1-120", suggesting a lure for users interested in gaming or similar topics. The presence of numerous links on disposable hosting and the ML classifier's high confidence score indicate a phishing or malware distribution attempt.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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=rogue+leveling+guide+1-120 In PDF document text
    • http://iuts.space/kawapabejuleginetzi0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386074/normal_6002a2e0c0a46.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxujagemo/haNCqt3/total_azolla_zs_46_data_sheet.pdfIn PDF document text
    • http://sberbank.services/subject_verb_agreement_worksheet_for_class_35vkc2.pdfIn PDF document text
    • http://sendgrid-de.com/62491172951plx7f.pdfIn PDF document text
    • http://lngcliente.com/what_are_the_main_features_of_christianityo4dur.pdfIn PDF document text
    • http://astrohelp.space/jorogozovinekigiknq68t.pdfIn PDF document text
    • http://latuha.com/parallel_circuits_practice_14._2_answerskx53i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367268/normal_6022df9309b74.pdfIn PDF document text
    • http://eushopvmn.site/how_to_start_business_in_pakistanrdq2o.pdfIn PDF document text
    • http://znasila.ru/jogosamilkv2g.pdfIn PDF document text
    • https://cdn.sqhk.co/vasinabew/6hehbSh/zavofimor.pdfIn PDF document text
    • http://reduslim-italy.site/munuxovupufifipakenaliboa73hi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450724/normal_6027a6b86dba5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_51d7aa3f0bdb4aa4957580e2c457497d.pdf?index=trueIn PDF document text
    • https://5fb42ee6-a9be-400a-98f2-f9d4b9f720c8.filesusr.com/ugd/1813b3_e15c048dcff945d1a9b16122390cf23b.pdf?index=trueIn PDF document text
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_c2c0b8e3b5f34d49ae612a817c56eeca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/debok.pdfIn PDF document text
    • https://c4cd0dbc-23d7-4f11-b65f-2561cec8abe5.filesusr.com/ugd/516793_ec04cfb5fa8242cba4f9a2943def8cf6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gekojulog/rancilio_silvia_e_v6_review.pdfIn PDF document text
    • https://0fc0baf9-b884-4fcd-968e-f93c0f938930.filesusr.com/ugd/68ec51_0616012ee4604527be74dc2958046045.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_off0001ce64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE64 4936 bytes
SHA-256: bf92649f8b52480354ea6931f2118d86e44fdd52383f83c8c2fea9204d84cdb1
font_01_sfnt_off0001df62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DF62 11788 bytes
SHA-256: 2654af1b843d562e424a5e834c111fcf6f200414687637297aed84c006a91de4

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