Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c863004e76b8d5…

MALICIOUS

PDF

151.8 KB Created: 2021-03-08 12:15:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2ac2c288e62b3086d9c8982115a65a71 SHA-1: 89d0cd83e9532a98376a4c591ec1a3b30da91c97 SHA-256: 56c863004e76b8d5faeb94f82264f666fbb5ae76299360bed1e612b14494fbeb
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 0.9956

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://jumiwimov.ru/123?utm_term=forma%25C3%25A7%25C3%25A3o+da+atmosfera+terrestre+primitiva PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481282/normal_602ad72a6a652.pdfIn PDF document text
    • http://kidufamipowanot.mywebcommunity.org/gomapeboparu.pdfIn PDF document text
    • https://dosijikapok.weebly.com/uploads/1/3/2/6/132682778/nabararexifiravudo.pdfIn PDF document text
    • http://metoxegid.mygamesonline.org/formato_de_nmina_en_blanco_para_rellenar_excel.pdfIn PDF document text
    • https://welusagosa.weebly.com/uploads/1/3/4/3/134355806/1262259.pdfIn PDF document text
    • https://posilopawirina.weebly.com/uploads/1/3/4/3/134353572/85aafa.pdfIn PDF document text
    • https://cdn.sqhk.co/tikomekove/Jgfihii/25305336420.pdfIn PDF document text
    • https://purotuduveb.weebly.com/uploads/1/3/0/7/130738796/644422.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370744/normal_5fefe0ca5effb.pdfIn PDF document text
    • http://zozavelomidabi.scienceontheweb.net/what_order_should_you_read_the_star_wars_books.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/65454956220.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496592/normal_600bbded67188.pdfIn PDF document text
    • http://jemulobapamiwu.mywebcommunity.org/zmodo_wireless_camera_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/fexilejedit/xgfg7Dp/age_of_empires_2_campaign_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383147/normal_6022da4b82a1d.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://zusaxadixuxot.myartsonline.com/xunakejab.pdfIn PDF document text
    • http://juludiripo.myartsonline.com/dumopibegizilo.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/luzuzanuwasufil.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/why_wont_my_water_heater_turn_off.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/zavasonimasepesole.pdfIn PDF document text
    • http://nabenejajoko.myartsonline.com/3411851001.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/duvitaviravalo.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/antigenic_variation.pdfIn PDF document text
    • http://lipeporo.onlinewebshop.net/convert_scanned_to_word_abbyy.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_off000202d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x202D1 5352 bytes
SHA-256: ba4c22315abedcaba311a5db4f9413d117d073573fdbca47162c1e681a9d8fa1
font_01_sfnt_off0002147a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2147A 14644 bytes
SHA-256: 75531e5f7b4535303177c74f42847221fa389fc737c06502c9d0625d172dd86d
font_02_sfnt_off00023fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23FD2 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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