Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef09e5ba5b4a3cec…

MALICIOUS

PDF

85.8 KB Created: 2021-01-17 06:31:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 021d34203c4e51003dc2ce9d948fbe3d SHA-1: 56818608d98f688024d86edcc0771f313dec0ea3 SHA-256: ef09e5ba5b4a3cecaa54b4f8c23f9da13d56e7f6866438e33a4c8beec4ad568b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URL pointing to a suspicious domain, which is a strong indicator of phishing or malware distribution. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall detection suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or to download a secondary payload.

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://trafficel.ru/123?utm_term=samsung+moisture+sensor+he+dryer+not+heating PDF link annotation
    • https://cdn.sqhk.co/gotoruzud/iyiapjf/calculator_math_papa.pdfIn PDF document text
    • https://cdn.sqhk.co/wevafofed/6N9Oxqo/ludo_king_app_game.pdfIn PDF document text
    • https://cdn.sqhk.co/muligumixe/Vshbb5r/brave_frontier_units_that_boost_exp.pdfIn PDF document text
    • https://site-1176450.mozfiles.com/files/1176450/my_little_pony_rainbow_runners_app.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/eTt8jfw/little_heroes_home_alone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368474/normal_5fdfad198da08.pdfIn PDF document text
    • https://site-1198654.mozfiles.com/files/1198654/anneliese_the_exorcist_tapes_2011.pdfIn PDF document text
    • https://site-1083884.mozfiles.com/files/1083884/xiaomi_mi_9_android_10.pdfIn PDF document text
    • https://cdn.sqhk.co/pegipoveridi/wyjfPib/kuxaribarogovarimivofada.pdfIn PDF document text
    • https://cdn.sqhk.co/xijodepub/geCvchc/maze_singing_lucifer_season_5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490735/normal_5fe323e670d71.pdfIn PDF document text
    • https://cdn.sqhk.co/sirazisiluz/Ql3F5jb/59397655112.pdfIn PDF document text
    • https://site-1180216.mozfiles.com/files/1180216/eufy_security_camera_models.pdfIn PDF document text
    • https://site-1175852.mozfiles.com/files/1175852/rbi_fcgpr_reporting.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://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_off0001043d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043D 5292 bytes
SHA-256: ebdf623346b31f61a0f30bc628fc75aac5d017b9afdcc529a754f785060769d1
font_01_sfnt_off00011607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11607 11096 bytes
SHA-256: 1f48cb756b17e5b6cbc68ab993150387bf94ad17c8946511ece95e374856a88e
font_02_sfnt_off00013bb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BB2 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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