Malicious PDF — malware analysis report

Static analysis result for SHA-256 92742de23ce7bb6f…

MALICIOUS

PDF

80.9 KB Created: 2021-04-07 20:36:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 33d97e8f03fdc937525bf27e6dad2834 SHA-1: b787485d85690f278e1f1f8b82548f73efcb7472 SHA-256: 92742de23ce7bb6f95ee3dfb000eeef3bd68cf7d6096646ae54329d6300175b7
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 0.9990

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/wix?keyword=volcano+webquest+answer+key PDF link annotation
    • http://nudistoff.club/lakshmi_ashtottara_shatanamavali_in_telugu_lyricsnddtt.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/applied_behavior_analysis_for_autism.pdfIn PDF document text
    • http://xonejalevesezom.sportsontheweb.net/taylor_swift_love_story_disco_lines_remix_tik_tok.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://twenty-promo2020.ru/nefuwerosigugigutotaks2fl.pdfIn PDF document text
    • http://freud.icu/94686963791titlu.pdfIn PDF document text
    • http://lukisasore.mywebcommunity.org/pivofivoviso.pdfIn PDF document text
    • http://mobutadaxez.medianewsonline.com/97753409467.pdfIn PDF document text
    • http://nout-prokat.website/82727595254b9z9e.pdfIn PDF document text
    • http://bogipeborowe.sportsontheweb.net/96222900444.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://esclick.pro/q_see_software_download_for_windows_73wjh7.pdfIn PDF document text
    • http://nunesop.scienceontheweb.net/cessna_421_parts_manual.pdfIn PDF document text
    • http://fdvsefwfrw.space/54653520057zmhp7.pdfIn PDF document text
    • http://geesecam.com/fezalupolajoxd6k.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tobito/10153205379.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27605a10-f4fb-4948-b2d9-dd30c0fc6434/69523630342.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/latest_version_of_ios_for_mac.pdfIn PDF document text
    • http://kadoxosin.atwebpages.com/cours_des_energies_renouvelables.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/62244728230.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/bachelard_libros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f887f8d7-c36e-46c8-b0a1-0cb23f14d4ab/how_to_assemble_cuisinart_classic_food_processor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e585a11f-bae2-4fec-bd6e-6cb36b44991f/68786061269.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/windows_10_latest_version_iso_2019.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA77 5284 bytes
SHA-256: 4bc42d78c0c75953a5808269c524e5e6175aab4225699c8cb1ded8c26840df6e
font_01_sfnt_off0000fc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9F 10344 bytes
SHA-256: 5a82d1ecd846809a9ba93a1cd1044e9875be6ce9e6430bc7a899b6c7d6004ec1
font_02_sfnt_off00011fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFF 16204 bytes
SHA-256: 31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf

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