Malicious PDF — malware analysis report

Static analysis result for SHA-256 f38782b51df6d024…

MALICIOUS

PDF

75.2 KB Created: 2021-03-25 05:02:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1330eabb0beb9171e5a0c6d2a187ea5c SHA-1: 7dee72255760aca9ad0c32800287bf832bcdf784 SHA-256: f38782b51df6d02400ed706d46de449df1c2225308cad3d29101833e190148b9
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The presence of external URIs and the overall structure suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/strik?utm_term=colored+pencil+techniques+flowers PDF link annotation
    • https://murufirekitopu.weebly.com/uploads/1/3/1/8/131856476/wenajades-sotokiru.pdfIn PDF document text
    • https://nixifekenebuj.weebly.com/uploads/1/3/0/7/130775280/mugexiniruxapo.pdfIn PDF document text
    • https://tejalegevususo.weebly.com/uploads/1/3/1/6/131637178/zavajoxovakobo-wematobuxaw.pdfIn PDF document text
    • https://cdn.sqhk.co/puzukebejas/2HFoIjc/65086022360.pdfIn PDF document text
    • https://wobanuwu.weebly.com/uploads/1/3/5/9/135959505/6621769.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370051/normal_602b3343d9635.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403946/normal_5fd11a0d99cc8.pdfIn PDF document text
    • http://ravovenovibu.medianewsonline.com/2021_ford_mustang_mach-e_california_route_1_horsepower.pdfIn PDF document text
    • https://cdn.sqhk.co/dubagojovo/gijm0gp/77085985052.pdfIn PDF document text
    • https://cdn.sqhk.co/xasurila/hhiibgi/black_desert_mobile_review_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424982/normal_5ff3813dde18c.pdfIn PDF document text
    • https://cdn.sqhk.co/mibupufek/ihjjieT/rofagik.pdfIn PDF document text
    • http://wedevaz.sportsontheweb.net/autocad_drawing_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450507/normal_5fd952cc23c0d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f313a003-2ccd-432d-85bd-1d768cf3f068/wapifiwipomipowizapod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84a16444-e3ce-4edd-b3f2-a08e4b1e66d9/add_text_to_file_c.pdfIn PDF document text
    • http://resilasijajatil.myartsonline.com/18391594293.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69e7abfc-7738-4911-b1ab-6278257c80e5/zoom_h4_recorder_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/dipupuwifati.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/reporting_factorial_anova_results_apa_style.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_off0000e8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DA 5156 bytes
SHA-256: e619928c5c6218256139cfbea0e25a35c4bf290dbd628ee1df49909934e5b42f
font_01_sfnt_off0000fa6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6D 10848 bytes
SHA-256: 98eb8e1d2c43ddb92003c4e1dda9bcd42a2f8b96887719adb2270d3de7a719f3

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