Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e75bfafa83332a1…

MALICIOUS

PDF

82.8 KB Created: 2021-03-29 16:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 35cc4cc0a1c0995713e456812946c4b9 SHA-1: 0f0998ebadb5ee28462f7ff26ac7b6643bd7a8bb SHA-256: 8e75bfafa83332a11bf595dbb458850ecaa902a89416dadeb1edb91ed3b991c0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/123?utm_term=compared+to+what+sheet+music PDF link annotation
    • https://cdn.sqhk.co/tejurorado/eSheCif/dr_driving_2_game_online_play.pdfIn PDF document text
    • http://gaxenop.medianewsonline.com/56638552065.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/spring_security_framework_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/nizivatitogu/ibjikhi/76731897679.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383136/normal_5fc6c708c9bee.pdfIn PDF document text
    • https://cdn.sqhk.co/dafisuwikib/idu0hb8/nuts_and_bolts_meaning_idioms.pdfIn PDF document text
    • https://cdn.sqhk.co/vomifavafo/QZhfzgj/guwivipatodopifexina.pdfIn PDF document text
    • http://sutivetowit.mypressonline.com/51739685072.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478414/normal_5fdcc3ec18a01.pdfIn PDF document text
    • https://cdn.sqhk.co/rotuzuwibi/ihXCYjc/29603096086.pdfIn PDF document text
    • https://cdn.sqhk.co/golemejexeno/idQigaP/69765539090.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/jPRiijb/the_last_survivors_game_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387060/normal_605012a18391a.pdfIn PDF document text
    • http://fulukegoror.getenjoyment.net/nezedaxu.pdfIn PDF document text
    • https://cdn.sqhk.co/livulopo/jbrhdig/33995649350.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449405/normal_6046e4339e360.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527902/normal_6016c3f2b266e.pdfIn PDF document text
    • http://rupazaduxil.mywebcommunity.org/fun_multiplication_worksheets_grade_4.pdfIn PDF document text
    • https://cdn.sqhk.co/pikukafil/gidNi37/minecraft_minigames_plugin_1._14.pdfIn PDF document text
    • http://fibiver.mygamesonline.org/lista_de_verbos_en_ingls_en_todos_los_tiempos_regulares_e_irregulares.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/39652429500.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/62347963762.pdfIn PDF document text
    • http://niwimugosaz.onlinewebshop.net/tavutozisefab.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/22152237061.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7B 5280 bytes
SHA-256: c2f64812a5233299adc2aaddc9f06bd1224cbbb204816d3f403e3c786ccd4428
font_01_sfnt_off0001004d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004D 11772 bytes
SHA-256: b2a06f1c3151ea80f3a5fc6b81bfc4c5cd5f87a5a3909e6a69a2745cc4fb64a9
font_02_sfnt_off00012819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12819 16120 bytes
SHA-256: 15a68420f1c377824b8c1fd571ac7c30556db1b4bc05006bf44ec3f6c6c83208

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