Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeeded37d7e400c0…

MALICIOUS

PDF

68.0 KB Created: 2021-03-12 00:51:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 022c38aaea0b1100e1ea4f1ad7045225 SHA-1: e0fdb3665c3e7a0ffc9ac0acfb28c8054e86faf0 SHA-256: eeeded37d7e400c05e3dfe89a16640f0fd2787841de68da91bb4b89dedb6565b
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with a primary suspicious URL being https://druttle.ru/123?utm_term=fossilisation+process+worksheet. The document body, though heavily obfuscated, suggests a lure related to a 'Fossilisation process worksheet', likely designed to trick users into clicking malicious links for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://druttle.ru/123?utm_term=fossilisation+process+worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4443810/normal_60059ebfed0ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492593/normal_6008d6686ec40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387709/normal_60475d5f58ca8.pdfIn PDF document text
    • http://dutebolidetol.iblogger.org/23225194564.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371020/normal_60465c6dc6b93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486215/normal_5fd929a8a7f5c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://natadomemorad.epizy.com/36323788245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac7ef0a4-bc73-4888-a5ef-8de25cee52c7/kindle_voyage_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ea4b254-539f-4cbb-97ef-d150b6c382ca/sifugexujugege.pdfIn PDF document text
    • http://viwuleraxukopiz.epizy.com/free_bread_machine_recipes.pdfIn PDF document text
    • http://kasupetaderimit.rf.gd/duduzubumon.pdfIn PDF document text
    • http://xaxefoz.epizy.com/47579755768.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f54169a-0fa4-4079-a2a7-96524daf3dc9/highest_aids_rate_in_the_us_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/diablo_1_belzebub_character.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1acaf2e9-dac4-4a20-bbd5-191ae638425b/totukisavejigexusiju.pdfIn PDF document text
    • http://xujogefup.rf.gd/vewinaxig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa9f97dc-396b-41d4-ad53-56e558ed592c/liwenokilowef.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/kuvogaduvesi.pdfIn PDF document text
    • http://megozesupulop.rf.gd/witozonuvixatuzolukuwez.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/plantronics_backbeat_go_410_problems.pdfIn PDF document text
    • http://nibudomatimemi.rf.gd/affidavit_declaration_letter_format.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/faxafepasimexeluwibirow.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/lolasatotixadogutedu.pdfIn PDF document text
    • http://wagagufogubejal.rf.gd/49564593841.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_off0000ce92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE92 5132 bytes
SHA-256: 19db1a3e40db15aa4a6ee436873b0b7e0c6831acc1559e5ae9fc3b942eec16cf
font_01_sfnt_off0000e01a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01A 10128 bytes
SHA-256: 12d2dc8bf41b3a9bf3bdf552aefcaa9fd86544c6eefa3b418874f85bdaecae02

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