Malicious PDF — malware analysis report

Static analysis result for SHA-256 5992864fe7cdfa2c…

MALICIOUS

PDF

76.5 KB Created: 2021-03-18 17:10:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: cea975af5803ca946ab6e53efc483ea1 SHA-1: 41b0f4a55dccc40931ec0a12c91f6be5f6d4d726 SHA-256: 5992864fe7cdfa2c15c86c4d4d2f09157f581ada94d1548dd4b677d8fb3c4731
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are SEO-related and point to other PDF files, suggesting a link farm or content-scraping operation. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution. The embedded URLs and the document's structure suggest an attempt to trick users into downloading further content, potentially leading to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/award?keyword=bhagavath+geetha+in+malayalam+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388835/normal_604cf67d91f01.pdfIn PDF document text
    • http://parralax.net/commedia_dellarte_scenariose5orp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499317/normal_5fe999a7e82ae.pdfIn PDF document text
    • http://akfb.online/92940931959eua80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484993/normal_5fefd6c996425.pdfIn PDF document text
    • http://top-agent.ru/81401930160xbtgl.pdfIn PDF document text
    • http://pro-gram.pro/72478787683ycntu.pdfIn PDF document text
    • http://smotrikino.fun/304490285321bdnw.pdfIn PDF document text
    • https://fipamowusaki.weebly.com/uploads/1/3/4/8/134879766/jojuragadizedin.pdfIn PDF document text
    • https://butapakenora.weebly.com/uploads/1/3/1/8/131871909/danoxomasunoxuxaxes.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/ce6549d9-c724-4888-8e0e-ef2968da6d1a/synonyms_worksheet_10th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/594ab036-567b-47b8-9b7e-d837c5c7d018/books_similar_to_lost_girl_tv_show.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/golowopo.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/improvement_plan_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/41526037036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6cc5c23-1514-40c2-8e7a-dfc7025b78de/how_to_calculate_instantaneous_velocity.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/sorag.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/macbeth_act_4_quiz_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/mastering_the_rockefeller_habits_by_verne_harnish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a33952a4-36ce-4f61-a8d6-1e7d46717e0c/1986_cuenta_conmigo_pelicula_completa_en_espaol_latino.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/link_vsco_x_full_pack_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e36b1b8-af4c-42da-b4d4-fefb236c7556/dyson_cinetic_big_ball_absolute_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/vizidugaxuxanipasuvujesi.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/bagan_keyboard_latest_crack_version_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_off0000e993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE993 5580 bytes
SHA-256: f4df3c1db6172f2489f561b1a80d2181f5ebbb66ead19b96439eed02292cce3e
font_01_sfnt_off0000fc89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC89 11612 bytes
SHA-256: 7ac75c3542989b3fe5992986c971a0f67a60785bc4b1128bb9cb9e1ba773ec18

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