Malicious PDF — malware analysis report

Static analysis result for SHA-256 68857316e8703853…

MALICIOUS

PDF

70.0 KB Created: 2021-03-19 04:58:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 2c9e2da161cdeb7ebce245f875258c60 SHA-1: e8950db6c023929550562ace1740ce7dae93de29 SHA-256: 68857316e8703853fb83b7f3f2f4f4e2ad1985d1d675be6c4cd84541ebd8dab9
184 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, specifically flagging it as a redirector to known malicious infrastructure. The embedded content, though heavily obfuscated, suggests a lure related to strategy guides, likely to entice users to click the malicious link. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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=pok%25C3%25A9mon+sun+and+moon+strategy+guide+pdf+download In PDF document text
    • https://static.s123-cdn-static.com/uploads/4387586/normal_5ff06e37c5455.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491169/normal_60029f5be9f15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457590/normal_5fdbd1a39fb36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402953/normal_6032b15658d80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454420/normal_5fe104c5e075e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374851/normal_60497098ee5e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446152/normal_6010f65491444.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411918/normal_5fe25a61f0f12.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/42306d27-0612-4790-a88a-00fd9fa7db29/why_animal_flow.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/what_weapons_can_monks_use_dnd.pdfIn PDF document text
    • https://e46eb8ae-11b5-47af-91b5-79e2db369635.filesusr.com/ugd/f84671_1ac0284d599f406e8b519ed6355f5cbf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a3c1393-8dd1-495e-846c-071bd1a34412/nulegakinis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b523a84-8523-4edb-a68c-b518f7b1f9b5/37150684088.pdfIn PDF document text
    • http://wowazatod.rf.gd/6372663500.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/zcc_brass_band_songs_mp3_download_fakaza.pdfIn PDF document text
    • http://texazufuvo.rf.gd/tosiwanukisubot.pdfIn PDF document text
    • http://xonifovozub.epizy.com/android_java_checkbox_programmatically.pdfIn PDF document text
    • http://gaxokumixopo.epizy.com/capital_one_email_address_format.pdfIn PDF document text
    • https://2386e270-bd20-42c1-b3e5-1ba7eaa1d68d.filesusr.com/ugd/b4f0c6_a6fcca1ae26341f9bc78a7bd9497bd43.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/maxigelinuteraxulon.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_off0000d083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD083 5760 bytes
SHA-256: 0ab1cdfef8b752f6456c9769d4095b3f57e6bfae714eb587686a5d05d2596c24
font_01_sfnt_off0000e3e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E8 10640 bytes
SHA-256: b3b4a59b8e865058350bb1f754a73cbc056c6c4c5739e8a398b9131f4ff30a38

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