Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb827b92662c0a2f…

MALICIOUS

PDF

80.5 KB Created: 2021-03-18 13:48:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b96a9f23d8e064dd6161fc5bd02ee79e SHA-1: 5e0dac832736ce8fbcbf2085e6b38cadfe743cda SHA-256: fb827b92662c0a2f6104693c6630ea06b0a573122d091f654f829e2d888718ca
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=questions+about+aristotle+nicomachean+ethics+book+1 PDF link annotation
    • http://gotexewadegu.iblogger.org/nenufoj.pdfIn PDF document text
    • https://cdn.sqhk.co/zidodovare/eMu5wgi/mustang_super_snake_for_sale_in_texas.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/28987913592.pdfIn PDF document text
    • http://meziradidanaru.iblogger.org/41383504094.pdfIn PDF document text
    • http://benosetib.iblogger.org/rca_dual_screen_portable_dvd_player_power_cord.pdfIn PDF document text
    • http://tuduvodakep.mypressonline.com/tuzar.pdfIn PDF document text
    • https://cdn.sqhk.co/sanojuxako/gUKRsPD/answer_back_to_me.pdfIn PDF document text
    • http://kazexezawulozij.mypressonline.com/86807278640.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426828/normal_605308bd1a17d.pdfIn PDF document text
    • https://cdn.sqhk.co/luxanimev/iEiiBid/xifafaje.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481513/normal_5fe105aa31a95.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mixawulemago.epizy.com/simple_modern_cv_template_word_free.pdfIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_7d53cc5654864148835a2eb0c42402f1.pdf?index=trueIn PDF document text
    • https://02796127-04ec-4c85-b270-c6f7310ebb18.filesusr.com/ugd/ce0e6d_56db974c24ed4d36af0d06d962d8e5d5.pdf?index=trueIn PDF document text
    • https://e4034479-4ead-418b-af8c-5be8dc72bdbe.filesusr.com/ugd/1e8759_b7377cbc7fa64e7bbc79805023a406cf.pdf?index=trueIn PDF document text
    • http://xifabemifuxiza.rf.gd/1080p_video_er_tamil.pdfIn PDF document text
    • http://sosipumetivebo.epizy.com/assembly_rowdy_movie_songs_naa_songs.pdfIn PDF document text
    • https://4541bc1c-e35c-4de3-bb44-1f53c3e1a56d.filesusr.com/ugd/68f66e_ad2703f257e2457c8531fc47705a1eb6.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE718 5356 bytes
SHA-256: 96eb3198f60a4095c67a47f6f107afc921b8e2ac4ce36dce549e37a9ab89415b
font_01_sfnt_off0000f922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF922 11252 bytes
SHA-256: cf9e658d83ce5d844234b7e4fc5d0bbe188f6305234687c62748110bdedae64d
font_02_sfnt_off00011f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F93 16060 bytes
SHA-256: 1a51fac5cecc05d5f0a5d3b698ffe240ccab470cdba6a823ba27c6c2a12c20dd

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