Malicious PDF — malware analysis report

Static analysis result for SHA-256 92b163211386330e…

MALICIOUS

PDF

75.2 KB Created: 2021-03-15 22:32:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7dd19f3006eae15c73128c21659d4889 SHA-1: acef29ff2ec9677f53b2ba2af22d2a6efee1ed07 SHA-256: 92b163211386330ebc42ea7ee9e9bcb10ff55951acc02896905668e25a690030
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. It contains numerous embedded URLs, with one prominent URL pointing to 'dugedepap.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates a pattern of using disposable hosting for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dugedepap.ru/123?utm_term=kaypacha+pele+report+august+2018 PDF link annotation
    • https://kitozegukelod.weebly.com/uploads/1/3/6/0/136056839/2de7385b2.pdfIn PDF document text
    • http://instgrmmverifiedbadge.com/dirunodusigbq79.pdfIn PDF document text
    • http://batmbatm.ru/do_pink_dye_test_have_evap_linescrjx3.pdfIn PDF document text
    • https://tiwebusimevadeb.weebly.com/uploads/1/3/5/3/135346158/c4b7f30.pdfIn PDF document text
    • http://yoga-fitness.space/prestonplayz_videos_todaysa30p.pdfIn PDF document text
    • http://edayafar.xyz/diono_car_seat_radian_rxt_rear_facing3zcm6.pdfIn PDF document text
    • http://datab.vip/libro_assassins_creed_forsaken_espaol01h18.pdfIn PDF document text
    • http://astrology-personal.online/where_to_donate_good_furniture1mz9g.pdfIn PDF document text
    • http://life50it.pro/aniversario_de_la_constitucin_mexicana_inglsjh9bj.pdfIn PDF document text
    • http://yogait.space/rev_heads_rally_mod_apk_rexdls68d0.pdfIn PDF document text
    • http://lorenbayi.com/pepujazn9hf.pdfIn PDF document text
    • http://menformula.xyz/2055280622t74iv.pdfIn PDF document text
    • http://lofitner.buzz/android_studio_change_icon_name02k9j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wamitut.epizy.com/what_are_examples_of_shared_values.pdfIn PDF document text
    • https://9764c975-acb6-4bd5-a3ff-b1f4624bc9bc.filesusr.com/ugd/5bcb7b_2fea71d182a54fa69ba7e98709b0f6ee.pdf?index=trueIn PDF document text
    • http://pemupenox.rf.gd/arch_linux_installation_guide_wifi.pdfIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_330b2f5ee1b04d6d940308a1baa7e48a.pdf?index=trueIn PDF document text
    • https://d99c26cc-8c68-456d-a039-1a26994c8d26.filesusr.com/ugd/105a8c_65427326c3574562b9126ab89f7f1cef.pdf?index=trueIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_30754c2c8ed04433a517b12364db874c.pdf?index=trueIn PDF document text
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_b03c4680c8014c91b51cfff8ed484dc7.pdf?index=trueIn PDF document text
    • http://baxodivol.rf.gd/wulevapusobixux.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE583 5784 bytes
SHA-256: 5b6c770bc56269e8575d70e7114b274a7d026f7d307a27385a09d8865dd806cd
font_01_sfnt_off0000f946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF946 10964 bytes
SHA-256: d616d52ceea3a41660ce4de28fdbbd8f7948196a671008c0e061d373e66f02f8

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