Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac8cb7b8c773eafd…

MALICIOUS

PDF

85.4 KB Created: 2021-03-18 18:52:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b2938143c29b5a61923ffc5d6052ca4 SHA-1: e429197b2a996638ed757fd79ee38e3887f730a5 SHA-256: ac8cb7b8c773eafdb42223af558b23ade0d656117f2dd734d469c8c3e0d19c0f
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, with a high risk score. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a payload or phish for credentials. The document body, though heavily obfuscated, suggests a lure related to 'the middleboro casebook pdf'. No scripts were extracted, but the presence of external URLs and the ML detection strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/award?keyword=the+middleboro+casebook+pdf
    • http://avto-document.site/41183588831e1m9w.pdf
    • http://finuxezanasa.mygamesonline.org/the_things_they_carried_tim_obrien_chapter_summary.pdf
    • https://cdn.sqhk.co/fujonexa/YBWhhUJ/terminator_dark_fate_sequel_to_t2.pdf
    • https://cdn.sqhk.co/poronujefino/ibiejgg/scp_mod_for_minecraft_pe_download.pdf
    • http://wownatural.fun/what_is_a_grimoire_crossword_cluemjx9f.pdf
    • http://gnoogle.site/37020568653njuxz.pdf
    • https://cdn.sqhk.co/kejofuvata/785ij1G/46109645763.pdf
    • https://cdn-cms.f-static.net/uploads/4454286/normal_5fdbe6c070ccf.pdf
    • https://cdn.sqhk.co/vupapevixu/jifjgja/game_idle_stickman_mod_apk.pdf
    • https://static.s123-cdn-static.com/uploads/4407729/normal_5fcb76887913b.pdf
    • http://nasezaf.22web.org/fusion_absorption_cours.pdf
    • https://static.s123-cdn-static.com/uploads/4480745/normal_5ffe715fa62de.pdf
    • http://ecoterritory.store/plantilla_para_plan_de_negocios_gratiscv7js.pdf
    • http://habirovradik.ru/what_is_punctuated_equilibrium_model_in_biologyoifd6.pdf
    • http://revenularozudo.66ghz.com/vipaxuleretuza.pdf
    • http://afracheat1.xyz/what_causes_rock_layers_to_fold01amw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zixaxonenugoko.epizy.com/2005_honda_accord_maint_reqd_light.pdf
    • http://pawuzax.onlinewebshop.net/guverevu.pdf
    • http://jitawidavez.atwebpages.com/la_famille_lamiaceae.pdf
    • http://mamesejo.epizy.com/software_cracking_tools.pdf
    • http://goduziposu.rf.gd/ant_video_er_firefox_free.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110cf.bin
15e3ad8a559b833a19dd454901e584582d3fe049389c400df998c92081e87e61
pdf-font-stream PDF embedded font (sfnt) at offset 0x110CF 5548 bytes
font_01_sfnt_off00012376.bin
9f24a1d25629720969fa682fec441b757ac2b9f685f52bf794f0e172dc1b6583
pdf-font-stream PDF embedded font (sfnt) at offset 0x12376 10848 bytes