Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b7e565e44503650…

MALICIOUS

PDF

84.9 KB Created: 2021-03-18 01:05:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f9857c41e5ba081ba994ef8f90b4720c SHA-1: 82fefbc1bcdeb641ea273b2e8d0ff9c60bb76767 SHA-256: 9b7e565e44503650a7c0fb51f9661298e9dcde10920f5f0b5611f5c95a89ca49
126 Risk Score

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 0.9992

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/wix?keyword=net+plus+certification+study+guide PDF link annotation
    • http://xoxuvajes.mywebcommunity.org/how_to_use_hans_3ds.pdfIn PDF document text
    • http://wigosixozem.mywebcommunity.org/total_war_attila_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/wukorovev/chhRXja/talking_cat_download_free_for_mobile.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444866/normal_6015fed756ef5.pdfIn PDF document text
    • https://cdn.sqhk.co/rajunakeb/7HXlgjQ/20504070087.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403282/normal_603b854c37cd5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368496/normal_5fde2d3e14f89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379359/normal_602fb0aac6a61.pdfIn PDF document text
    • http://nupesupo.mypressonline.com/resume_letter.pdfIn PDF document text
    • http://ralugugifoxatir.scienceontheweb.net/burisokaf.pdfIn PDF document text
    • https://cdn.sqhk.co/kikepedu/ihB3icr/36356131407.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/ihghgeK/best_free_meme_generator_for_ios.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
    • http://lupixopuvir.onlinewebshop.net/saxophone_repair_shop_philippines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/038610a3-f13d-4864-95b0-a8964d64cfe7/a_streetcar_named_desire_play_by_tennessee_williams_summary.pdfIn PDF document text
    • https://44879a12-c10a-431c-a98a-7de142752d0f.filesusr.com/ugd/bb4607_8871b3ab396048c6b922b3c05bbd1962.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a221e83-632e-44bf-badf-5f704c630bdd/gregor_the_overlander_movie_release_date.pdfIn PDF document text
    • https://46b09160-81f9-4cb3-9cca-f7b5b0c0229e.filesusr.com/ugd/179cc6_9f6948cbf8b34e888425d08063a34796.pdf?index=trueIn PDF document text
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_f8c975e3f8b84595b374b0d7bd524c9a.pdf?index=trueIn PDF document text
    • http://molagegivijoxu.onlinewebshop.net/84835626079.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5446cad-cbbb-4957-ad10-3aa69e77a97e/cisco_dpc3825_firmware.pdfIn PDF document text
    • http://jojulupijawide.onlinewebshop.net/13040072135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/558500d0-08e5-42de-8115-4a3c68df863f/what_order_should_i_read_the_forgotten_realms_books.pdfIn PDF document text
    • https://1e438cd7-6f3b-42ac-a97b-d13a75fa135b.filesusr.com/ugd/0c268c_3984a427dff24512aaa611199a5bad8d.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBF 5276 bytes
SHA-256: abe7ca418c4f94f66c347b1231ead88440bff56dfad4a04332e3a207ca6eab98
font_01_sfnt_off00010ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC5 11672 bytes
SHA-256: cd5c24ea486c233563b3902c405c31e379bc96af8acf8fc6082abf4f2f09a301
font_02_sfnt_off00013674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13674 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3