Malicious PDF — malware analysis report

Static analysis result for SHA-256 6267280cba4895dc…

MALICIOUS

PDF

72.9 KB Created: 2020-11-21 22:00:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c37980e71c4bec95f4a2a711b6ad385e SHA-1: b03c7ab923952fb2cc5b4806b4544d34b646a232 SHA-256: 6267280cba4895dc452fcab24798abda4b4b767feeec886161a1fffb84b952f2
96 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 payload. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to banning a book, which is a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/123?utm_term=why+catcher+in+the+rye+should+be+banned PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374852/normal_5faad5c03ed17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374715/normal_5f890b02842e4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/59263100134.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c708c45e-def5-4d2a-97f5-66e6db2b31a3/guide_to_tenerife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0854c4fc-130d-47e8-83e3-ce92bd63e672/62105370307.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/bass_boosted_songs_djpunjab.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/5375497662.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e8a0d35-0466-406f-8ed2-6df0155d59f0/roundup_realty_property_management_sacramento.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ac26d1d-25e5-4dae-98b7-b861120cc8ca/12370212241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36744c8d-29ae-4d69-a7ee-7a040c5cd027/vofiluxopikujuxexe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0067a8c5-d13e-41dd-aa48-838e409cb53a/2008_mercury_115_optimax_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a118aa7-09b2-4051-b31f-5c9412e0606a/vitewuvi.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/war_wings_hack_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e86a99e-b716-45dc-b282-b732f2db1dce/ring_of_fire_lyrics_azlyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/dixunoxusikukagubaxitaj.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/baxigatusa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD497 5164 bytes
SHA-256: 206e8c7d2356b509770ea406c3921aed83fc4bf96b279b72e568e7ff0ce6cf4e
font_01_sfnt_off0000e620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE620 10096 bytes
SHA-256: fdb162ca2187a98441aa0a55945d9f3f497215cbfebd29f2f582eaac3cdf86ba
font_02_sfnt_off00010894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10894 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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