Malicious PDF — malware analysis report

Static analysis result for SHA-256 08561fb76bcd7c1a…

MALICIOUS

PDF

72.5 KB Created: 2021-03-20 21:27:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1f6280d7102d4e8210d20ca765531ef SHA-1: b76476953648f799d672ee09fcb43030369bb70b SHA-256: 08561fb76bcd7c1a6ca10a906fae64c975e8c3b08fce3c97c1001d677b703d2e
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a URL that appears to be a lure for downloading a "Warhammer 40k deathwatch codex pdf". The ClamAV detection and ML classifier strongly indicate maliciousness, likely a phishing or trojan delivery mechanism. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/award?keyword=warhammer+40k+deathwatch+codex+pdf+download
    • http://gilogaviteno.iblogger.org/23185779276.pdf
    • http://civiliscmq.online/what_is_the_default_password_for_asus_routermf19c.pdf
    • http://losadodika.22web.org/epson_wf_2630_print_head_cleaning.pdf
    • https://lolekujawifom.weebly.com/uploads/1/3/1/0/131070351/vamidewupiwip.pdf
    • https://nanuvofekoredam.weebly.com/uploads/1/3/5/3/135385966/1dfdb.pdf
    • https://japarikadag.weebly.com/uploads/1/3/4/1/134108792/kekanazewisugok.pdf
    • http://fabermanufacture.ru/33332933421n4bkx.pdf
    • http://fofitev.22web.org/39228313140.pdf
    • https://sezenoxesakibek.weebly.com/uploads/1/3/0/7/130740551/tuwano_bisumar_bilofisika.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jujojomojemiz/krishnath_college_anti_ragging_form.pdf
    • https://s3.amazonaws.com/xoferuzu/how_to_factory_reset_iphone_5_without_itunes_forgot_passcode.pdf
    • http://tajerakujo.rf.gd/rockola_jukebox_price_guide.pdf
    • https://s3.amazonaws.com/marimejerebo/nusofesazadukikobaka.pdf
    • https://s3.amazonaws.com/megelugik/zexepoleguwasizetexixomok.pdf
    • http://migisopipa.epizy.com/cub_scout_lion_parent_and_leader_guidebook.pdf
    • http://vesebebiwimana.epizy.com/94550613646.pdf
    • http://tarobajasupimi.epizy.com/auric_basin_achievement_guide.pdf
    • http://jobubiro.epizy.com/14_august_2019_wallpaper_hd.pdf
    • http://muputuxu.epizy.com/car_payment_receipt.pdf
    • http://buzuxujov.epizy.com/sabigunipadixukovefo.pdf
    • http://sobuzazan.rf.gd/26835078419.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_off0000d94f.bin
b0eae8b55838f5f36a9c94fe9241b5264d973639fa82c5e7e36617a3110722e3
pdf-font-stream PDF embedded font (sfnt) at offset 0xD94F 5684 bytes
font_01_sfnt_off0000eca0.bin
07e922af76a781bba6fde9febe46adfd5feb096884a8804b3b3e37f8f6c5d2b8
pdf-font-stream PDF embedded font (sfnt) at offset 0xECA0 11656 bytes