Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d7fbf8329efcf52…

MALICIOUS

PDF

122.5 KB Created: 2021-05-14 17:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b5d732cd5fa2918d81a3c28670ba2c83 SHA-1: b8e776863569ac79f5ce1ae092a870180b330041 SHA-256: 6d7fbf8329efcf523b8caff176ff9915ab5eb75badd760faa42c5d6fa34a56a0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that is likely part of a phishing campaign. The document body, though heavily obfuscated, suggests a lure related to 'critical media literacy'. No scripts were extracted, but the overall structure and URL usage point towards a phishing attack.

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 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://bologen.ru/strik?utm_term=what+is+critical+media+literacy PDF link annotation
    • https://zuwuroxiver.weebly.com/uploads/1/3/1/0/131070979/zafored.pdfIn PDF document text
    • https://davabodijesofid.weebly.com/uploads/1/3/4/4/134474123/5331cd835e57d.pdfIn PDF document text
    • http://pegamafawepodu.22web.org/air_suspension_system_report.pdfIn PDF document text
    • http://lazadoso.iblogger.org/topographic_profile_practice_worksheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_275b72a69af04803b032e56441e54f23.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/db5e73e2-c680-4cdc-9ac0-3c177759094a/leo_tolstoy_story_three_questions_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/calepino_de_motul.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/boarding_pass_indigo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e215ac9e-354c-4d26-b132-a16aaa500ad3/how_to_analyse_risk_assessment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71c296df-a167-41ce-918c-e6543e44b26a/burajapomujoto.pdfIn PDF document text
    • http://jifumowujawot.rf.gd/gokafagusafufexobewom.pdfIn PDF document text
    • http://xofawuriduk.epizy.com/notification_library_android_github.pdfIn PDF document text
    • http://regujivabi.rf.gd/19546901570.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/50034256882.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/81538395574.pdfIn PDF document text
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_b4d87ac0fe7844a4b9286887c2376277.pdf?index=trueIn PDF document text
    • http://fizarurepolap.epizy.com/xozaxa.pdfIn PDF document text
    • http://nadurajamewe.epizy.com/29746092148.pdfIn PDF document text
    • http://jopatodorijapu.epizy.com/cuneiform_in_mesopotamia.pdfIn PDF document text
    • http://tunawibiga.rf.gd/conditional_formatting_in_google_sheets_duplicates.pdfIn PDF document text
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_063adee45e45476e97f696e0a997c4fa.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_off0001a39e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A39E 5292 bytes
SHA-256: 1a25ea26e3c30d9389f187548b9554a89aade0b08cbf0bf6c97579c2ec121269
font_01_sfnt_off0001b57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B57F 11860 bytes
SHA-256: 98fdd5de66bf624f435c5bc68bd096ca5dffa00ba8a28c25ac47289059475dcf

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