Malicious PDF — malware analysis report

Static analysis result for SHA-256 38a180aa658e2956…

MALICIOUS

PDF

78.7 KB Created: 2021-03-29 12:49:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 402b3b88457ddffee4af9e707fe68326 SHA-1: 1ae50f16fa3a73312b693ca638c1ac3efd376a99 SHA-256: 38a180aa658e29569d486adac017d217cd7b8871e0a054086e95a7b3d1b124aa
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 0.9997

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/award?keyword=lesson+plan+on+adjectives+for+8th+grade+pdf PDF link annotation
    • https://cdn.sqhk.co/guranotup/Rvighiw/86741766912.pdfIn PDF document text
    • http://tideboweped.medianewsonline.com/31029209431.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369777/normal_6005c9e2d76a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461767/normal_603f667a9ae81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496597/normal_602f7af463f08.pdfIn PDF document text
    • https://boxavukexuzar.weebly.com/uploads/1/3/0/7/130775797/zekalole_moxugito_kuladad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384323/normal_5fd7721ea9046.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493597/normal_6003161b30f6d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426060/normal_5ff18d3d4e8b9.pdfIn PDF document text
    • https://cdn.sqhk.co/denugesugumu/bjhhcii/vukisewuvu.pdfIn PDF document text
    • https://xudagemiribu.weebly.com/uploads/1/3/1/3/131378943/373b7f4d50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445337/normal_5fd0519b75ab2.pdfIn PDF document text
    • http://wurilozi.scienceontheweb.net/dumubuzutoxabamatibij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472773/normal_6032e496cf045.pdfIn PDF document text
    • http://tazizinujumijoj.mywebcommunity.org/piano_adventures_level_2b_lesson_book.pdfIn PDF document text
    • https://xewidepomizexas.weebly.com/uploads/1/3/0/7/130775014/zajejozemuzawulazev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kezemiradigu/83105067254.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/raju_name_ringtone_free.pdfIn PDF document text
    • http://manuwakagekewu.onlinewebshop.net/ai_and_machine_learning_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/keyboard_chord_chart_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D9 5476 bytes
SHA-256: c8d6ae44e79d70d3e062333b6f9fab4a186bb64df3cfa2912e2c32c0fe70567a
font_01_sfnt_off0000fa79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA79 10680 bytes
SHA-256: 5b358384aa8808d2ab3158c3c41a032023c27f7cdc6ec3bf5d47970cd519d761
font_02_sfnt_off00011eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB7 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

Open this report in the interactive analyzer, or submit your own file for analysis.