Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e93de8fb14cd24…

MALICIOUS

PDF

102.8 KB Created: 2021-03-14 18:54:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9489ee2df223be29247a787b9bbd593b SHA-1: 10af9501cc5a973888bf27208b8f1d7100727f59 SHA-256: 46e93de8fb14cd24f569de919253591ef9d2451de4ace3ce128a925334662fab
156 Risk Score

Malware Insights

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

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 0.9864

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 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/123?utm_term=appendiceal+neoplasm+case+report PDF link annotation
    • http://mumijivamivaxij.medianewsonline.com/venn_diagram_exam_questions.pdfIn PDF document text
    • http://numulul.mygamesonline.org/73773117027.pdfIn PDF document text
    • http://vanimerukaguto.scienceontheweb.net/82444427791.pdfIn PDF document text
    • http://vekisonoloze.sportsontheweb.net/all_action_verbs.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
    • https://s3.amazonaws.com/vavebufevodutob/hum_hain_bemisal_south_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a78f6175-5638-4c51-b610-bf35ec5a9e07/79774254217.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/ejemplos_de_alcanos_alquenos_y_alquinos.pdfIn PDF document text
    • https://d2d110b1-dce0-4b0c-bed7-be24280b7a6e.filesusr.com/ugd/165585_599b4671df524204b10bbead5c34861c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb244dc8-73db-4d24-9b03-a80a58208f80/85418454588.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/how_to_get_my_act_workkeys_scores.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/aimsun_8._2_manual.pdfIn PDF document text
    • https://ff102949-4c65-4b7b-925c-ea9a98d885fa.filesusr.com/ugd/7a16bb_59d0e2c7084a4943a757f884dc4c9eb5.pdf?index=trueIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_c51483207ec04f72a19c5208a2c9211a.pdf?index=trueIn PDF document text
    • https://e57d8632-f742-4524-ada6-9cdf759d9f13.filesusr.com/ugd/b0cb2d_1b8dae60c9104c478abefa57afec7bac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dojonuta/answer_phone_number_of_rings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a28ea85c-e129-40f1-b33f-072b6867a775/woniv.pdfIn PDF document text
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_f54772677c6848bdb963bcf88d6287f1.pdf?index=trueIn PDF document text
    • https://9764c975-acb6-4bd5-a3ff-b1f4624bc9bc.filesusr.com/ugd/5bcb7b_5c6fb783c94340c6816a5903b6c7924d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7f5011a-c222-4e78-b4be-3210a7d181d3/cuantos_metros_mide_un_lote_de_terreno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b373c352-f49a-4487-b014-8361bd99aca0/navien_ch_240_manual.pdfIn PDF document text
    • https://ea7788ad-ef5a-48b5-911d-3ad522045378.filesusr.com/ugd/f3bfbb_ec809467638f440cbc458d7e58199525.pdf?index=trueIn PDF document text
    • https://994180ce-385f-4272-9833-4a204a825e0f.filesusr.com/ugd/ec0c41_0d69597f60624d768a8b6d9f9c7737fb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lomuper/nubibojuzidokijolisobu.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/bijakenuvemonodixurex.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/bmcc_student_email_format.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/breast_lump_surgery_guidelines.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DCA 4996 bytes
SHA-256: 9271ee7dede5a140913f9e2aa43b2e0844fbe8bc5c364ef39a5f958e2822a71d
font_01_sfnt_off00013e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E9A 12168 bytes
SHA-256: 22f0547398b8fbb8bbf55f636965f54ac8f484894bb4e5fcfa83a7b0573d3173
font_02_sfnt_off000167ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167BA 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3
font_03_sfnt_off00017ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CCF 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3