Malicious PDF — malware analysis report

Static analysis result for SHA-256 97b26e9922e69e69…

MALICIOUS

PDF

78.3 KB Created: 2021-03-22 14:50:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e68bb95bf2a797e41633e85c2e030890 SHA-1: d4ab019a3b760dcf61452308e98e6814b196e450 SHA-256: 97b26e9922e69e69ffdce103a8e1d386cc889114128917a810e92b12b6d89949
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The embedded URL and the document body suggest a phishing lure related to a game hack, aiming to trick users into downloading further malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/123?utm_term=boom+beach+hack+new+version PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413966/normal_5fe68ffe47067.pdfIn PDF document text
    • http://sifimomikev.sportsontheweb.net/vupewitojijawofogisufol.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/molebexaruwizofese.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415767/normal_6017a288b4a4a.pdfIn PDF document text
    • http://moderivapotilos.22web.org/74096963626.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366350/normal_5ff7ab74a9b60.pdfIn PDF document text
    • http://jelojutu.sportsontheweb.net/50551524648.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418985/normal_5fd30da5cb7c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501042/normal_5fe2036c2ce59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375339/normal_60112eeadaa5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469136/normal_600400d9b00c2.pdfIn PDF document text
    • http://guromufupadaf.iblogger.org/chemistry_if8766_metrics_and_measurement_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370528/normal_6038b5c2a786e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454809/normal_6035fd8748dec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wagewatudol.rf.gd/the_sandman_wrestler_net_worth.pdfIn PDF document text
    • http://wififeju.atwebpages.com/94283851076.pdfIn PDF document text
    • https://78ee58ad-4251-4cb6-9d9e-6f806931ac90.filesusr.com/ugd/b6b4e8_030b65d72dd94a60b4264b672a78c037.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb337bb9-bc28-4ca5-aeb7-37ab204e7bef/51531621663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b18daf66-eeb1-453f-a2fd-37807403ab73/80843650397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e60a19fe-b12e-432e-a6e1-10d0453b1935/79038331024.pdfIn PDF document text
    • https://fefcf4f0-bf52-4086-adb3-b788df03f7bd.filesusr.com/ugd/da9d4c_3c7f5af7981b43118ab32a566c77cf43.pdf?index=trueIn PDF document text
    • http://nitovotiroxe.epizy.com/hollywood_action_full_movies_free.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E4 5412 bytes
SHA-256: 6905e9269511b76c7c9a2e7313288b713daf677728601eeec16e8648a99d6de1
font_01_sfnt_off00010539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10539 12220 bytes
SHA-256: c28c846db93ff20ab33173b77daaca454dcdffc995b993cd466111751d6e7780

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