Malicious PDF — malware analysis report

Static analysis result for SHA-256 69907b111e56c4ae…

MALICIOUS

PDF

79.0 KB Created: 2021-04-06 10:40:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: eef5c6e51fd9c8f3f1876fcac49007e6 SHA-1: 53a56309688ba6be76fe4adc0a01370e1e767009 SHA-256: 69907b111e56c4ae520c7aca081be241808359bcab611e1e3284b6329d9e010b
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 0.9998

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://zajinet.ru/wix?keyword=calculus+2+final+exam+study+guide PDF link annotation
    • http://bopolubolef.mywebcommunity.org/english_b1_practice_test.pdfIn PDF document text
    • http://wefufivubulal.medianewsonline.com/acanthomatous_ameloblastoma.pdfIn PDF document text
    • http://mizafaroremida.getenjoyment.net/gifememedizitokatekuvib.pdfIn PDF document text
    • http://dotavulilego.mypressonline.com/bowditch_volume_1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0c43c058-97b3-435a-b041-a9f001bfa883.filesusr.com/ugd/791d74_3653f44d806247e4a7d2b9cdda5f54b9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gogonof/aircheck_manager_software.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/resume_for_assistant_professor_in_engineering_college.pdfIn PDF document text
    • https://9907981b-0bc7-4fd3-a434-169f7cdadf42.filesusr.com/ugd/575363_5c9fd32fce6f4948ab27d4f18fd0f526.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/4156389104.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/70848678057.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/9892888479.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2394029-27ec-4738-a0b1-e19eb8fd85bf/29533829021.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/xijaxijuriwebezukogufa.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/zagatewazumigizajezoju.pdfIn PDF document text
    • https://52a1af19-6946-4c37-aba6-ab00a30e4874.filesusr.com/ugd/5dc3ca_31925ef29ce64e2f947dd3476378138d.pdf?index=trueIn PDF document text
    • https://68fdcf0a-b1f0-4758-9edf-48d2be6d990b.filesusr.com/ugd/ac51ce_23ca014213a342cfacb32c5732be4296.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecaf6e6d-f0cb-4f55-a213-a23e637deeb3/how_to_cook_rice_in_oster_steamer_5711.pdfIn PDF document text
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_9c6d8e457cc841f79dce15c002d71e55.pdf?index=trueIn PDF document text
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_de60fd2f5f934c70aac393010fae7749.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f88d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88D 5452 bytes
SHA-256: fa7aa710081b3729dcd662c2a02bc20a48e8807b1086240c903ba2f67bb44bb4
font_01_sfnt_off00010b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1B 10548 bytes
SHA-256: 686074e3bd90cbdfcdf65bb54287614d28264539e0c37083af737eee337eb3cf

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