Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a5b8d20cd1a2681…

MALICIOUS

PDF

87.9 KB Created: 2021-02-13 04:31:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 57521d41dc8b5dc41496c2e9f3eaf31d SHA-1: b46aab9451317e307c394c404c9f6a15d4a3dc19 SHA-256: 6a5b8d20cd1a26819d7711c4a83c8879f4a65fc8bc22c3ac8accea0148052e2d
136 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_UTM_REDIRECTOR_LINK' suggests the document uses an image lure to redirect users to an SEO-optimized link, likely for phishing or malware distribution. The embedded URL 'https://maypoin.ru/123?utm_term=chester+bennington+quotes+on+music' is a primary indicator of this malicious 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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://maypoin.ru/123?utm_term=chester+bennington+quotes+on+music PDF link annotation
    • http://maselawave.22web.org/31612390302.pdfIn PDF document text
    • http://gakujimogudap.22web.org/all_whole_exercises.pdfIn PDF document text
    • http://ryduslim.website/fubukuviselenawiwegv8kox.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
    • http://rigozapovi.epizy.com/backstab_apk_game.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/21813847917.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/sirukeb.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/casanova_hotel_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/navevidisaziwajefofimajup.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/kamigogabo.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/king_arthur_movie_music.pdfIn PDF document text
    • http://lemijafuw.epizy.com/laravel_5._7_reset_password_email_template.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/91638770597.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/kebutuhan_dasar_manusia_dalam_keperawatan.pdfIn PDF document text
    • http://faputigumajo.rf.gd/bra_mne_till_informerande_tal.pdfIn PDF document text
    • http://gisipusizen.rf.gd/free_fourth_grade_math_word_problem_worksheets.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF6 5140 bytes
SHA-256: ade3daaca690af9149ff0814934545d8c19b111fdcd6cd2c1046067d50fe9106
font_01_sfnt_off00011f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F44 10968 bytes
SHA-256: 0375805235babf4e93642e916e3280ff38619a9c2000f77d3e841ae5921787a6
font_02_sfnt_off000143ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143ED 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.