Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5798df1ed833f22…

MALICIOUS

PDF

79.5 KB Created: 2021-04-19 05:14:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d5dd2b63a1955cf5ca65bc3df18cae04 SHA-1: 1dc468572e2d9718d589f36092f0327ea6aa7b80 SHA-256: e5798df1ed833f222422253d7b295368f9b175756fd601e11991a243f81210cf
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=maze+runner+books+in+order+to+read PDF link annotation
    • http://kayikciakademi.com/56941454611yn29z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460076/normal_5febb070154a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416143/normal_602b2802440d7.pdfIn PDF document text
    • http://webpost.pro/zatedebejufirun402lm.pdfIn PDF document text
    • http://welitizenowem.mywebcommunity.org/what_words_should_not_be_capitalized_in_a_title.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455390/normal_605ee5fad42d8.pdfIn PDF document text
    • http://italiahot.fun/68086560192i7kc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496005/normal_604672cb38797.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d4180a97-8dd0-4bf1-9e2f-d1b128d1a64d.filesusr.com/ugd/ae059d_d194932672d44e568ce48eb240ff9a97.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1fb5bd6-f37b-469e-807f-109c241a68b8/does_failing_a_pre_employment_dot_drug_test_go_on_your_record.pdfIn PDF document text
    • https://68f2566a-c586-4d15-a5d1-3a72044c38f3.filesusr.com/ugd/ecec20_4be0cfbba07649e5a4befdafa1ebc0b3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/telasebisu/29562564108.pdfIn PDF document text
    • https://1f2f8e77-98df-4c5e-b88a-83bc2b612b58.filesusr.com/ugd/5c7528_d2a001d1d7664ade90f682a2a43b9722.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7b50d85-57b8-4daf-8425-9e73cfc9cd7e/mexerapexonepejuturagiruf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/138cbac7-6001-4f6f-a70b-9eed784a3810/kanowiwiwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0751db1f-4a17-4009-b455-abaf2c819c47/physics_equation_to_find_final_velocity.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/zamegiv.pdfIn PDF document text
    • http://ligekasuxube.onlinewebshop.net/40371002797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39e7fdc5-491e-46ab-8e34-87705b27bd8a/what_is_the_best_magic_tree_house_book.pdfIn PDF document text
    • http://segimoto.myartsonline.com/jewifixexetudapidego.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

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_off0000f9db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DB 5044 bytes
SHA-256: 9b2710e0846c5defc90534696965088ab9859e0ba6800bf8a6fe2618d03aa936
font_01_sfnt_off00010b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B22 11088 bytes
SHA-256: 37829ae62b388d0beee48eb0e7da6b18af0c7f079b6f3b8587e09dff8fdc1904

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