Malicious PDF — malware analysis report

Static analysis result for SHA-256 47160f3901509ba0…

MALICIOUS

PDF

85.1 KB Created: 2021-03-17 07:18:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 41cf9a87af9264db899148e969834e5a SHA-1: 91b667139d23a238f4e0bf8e0aa6f02584c98dd3 SHA-256: 47160f3901509ba04ae33b3c8319ef0f1c43ca7d25409d14ecd38a9012d74c40
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm designed to direct users to a large number of other PDF documents. The primary URL suggests a lure related to 'business process management' to attract victims. While no scripts were extracted, the PDF structure and extensive external linking strongly indicate malicious intent, likely for SEO spam or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/award?keyword=business+process+management+pdf PDF link annotation
    • https://cdn.sqhk.co/narulaloro/Brjijhb/87852438499.pdfIn PDF document text
    • https://cdn.sqhk.co/pozuwifofub/jeljfij/wujozajubapajuwibida.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/5zDAhae/olvidarte_como_lyrics_in_english.pdfIn PDF document text
    • http://kilekapalovuzo.getenjoyment.net/86953961826.pdfIn PDF document text
    • https://cdn.sqhk.co/worenora/q7Yhbij/31514242154.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xekabotiwuker.atwebpages.com/adenitis_mesentrica_en_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/avadhuta_gita_espaol.pdfIn PDF document text
    • https://2e03c77f-99cc-4591-9807-54d8d49c9ce6.filesusr.com/ugd/759733_f371fcc0af504704a5b5c4b08f72f102.pdf?index=trueIn PDF document text
    • https://e3055f73-6236-423b-b810-4bc1a15f300f.filesusr.com/ugd/fa12d1_25ffe1f23ddf448bb38f5263a29bd592.pdf?index=trueIn PDF document text
    • http://kivozusemu.atwebpages.com/5305649355.pdfIn PDF document text
    • https://488c2ff9-9ff4-499e-8f11-525115e20b22.filesusr.com/ugd/8aba0c_4735aa5b9e98474d80a644493ed91f82.pdf?index=trueIn PDF document text
    • https://e40da922-b0e4-44be-9878-2d4898ccab21.filesusr.com/ugd/3a38e0_0b7351f3e57c469e8623b9ea32b53c75.pdf?index=trueIn PDF document text
    • https://f84ffea9-2755-49c2-9cb5-47ca8b55fe65.filesusr.com/ugd/0adedf_c16fac101eda484e8e5d34744cf1f4c5.pdf?index=trueIn PDF document text
    • https://8458b573-1d6d-478c-912c-b10a972f31df.filesusr.com/ugd/150112_f4790eef8eb847c78866e69abca9d998.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/tiseg.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/cisco_cable_modem_dpc3010_login.pdfIn PDF document text
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_7e4c06a771ce44999eb1ee7386ba3eb7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xakusineba/56843679080.pdfIn PDF document text
    • https://590703a0-be71-4d3c-a49f-17767d5969ef.filesusr.com/ugd/656c20_a644f370e2134801a5d3231441bf7ba8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wovisak/email_hunter_for_google_chrome.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/blast_furnace_guide_steel.pdfIn PDF document text
    • https://37991ae0-d72b-4ccf-bf90-288dedd591e7.filesusr.com/ugd/041b56_0acf3d3dba864e97b8c9c89b2bc6bbe4.pdf?index=trueIn PDF document text
    • https://doi.org/10In 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2A 5492 bytes
SHA-256: b9882b7ff35204032584092819cb9a00158a9b65b84b5ccf3fd152df6a14aa53
font_01_sfnt_off00011fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC5 11568 bytes
SHA-256: 63092a716b09f2f71c52fbc62910265a4ca9b10d3fabe0548c8be89bf5e82174

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