Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ef4f03d42cd644…

MALICIOUS

PDF

76.3 KB Created: 2021-03-31 18:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 002dccf098aa50a56bec473ca0fefe28 SHA-1: 8b93f8ca0ff586d32294362ca6fcfe007e9f4820 SHA-256: 02ef4f03d42cd6441f887937ec1e9b2c2cf0b7018815c56f5f41dfbd74c0b0d6
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used in SEO farms or phishing campaigns to drive traffic to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/award?keyword=air+conditioning+system+in+vehicle+pdf PDF link annotation
    • http://jofipifemu.medianewsonline.com/oxford_picture_dictionary_download_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nurofiwele/ggfosic/where_s_my_water_2_level_49.pdfIn PDF document text
    • http://tafuxasomup.getenjoyment.net/33233467784.pdfIn PDF document text
    • https://cdn.sqhk.co/vefasebo/Wmagfhf/90123124903.pdfIn PDF document text
    • http://xokezuwadem.mygamesonline.org/zanewib.pdfIn PDF document text
    • http://peluxuba.sportsontheweb.net/i_cant_share_someones_post_on_facebook.pdfIn PDF document text
    • https://cdn.sqhk.co/muzorefu/ZNgeEhf/78881853515.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/f0huibH/uber_driver_registration_new_york.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cf336f9a-6a79-4542-9269-5b62d6eb69dd.filesusr.com/ugd/1daf83_161c0d1b1fb7409cb7ddd35bc6e68ae8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/bukemagov.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/coptotermes_acinaciformis_termites.pdfIn PDF document text
    • https://0ea28b16-58c2-472d-b6be-3e97fe9b7bb6.filesusr.com/ugd/696b8a_44d3ffe1fa7245cc92fd0c71b4b4337c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tobaziw/61001668240.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/calfresh_application_form_alameda_county.pdfIn PDF document text
    • http://relivoziz.atwebpages.com/domingo_garcia_belaunde_las_constituciones_del_peru.pdfIn PDF document text
    • http://rabelinowizufe.myartsonline.com/luwigenuzakutari.pdfIn PDF document text
    • https://123949be-7110-4ba3-a240-a7df06fb38ce.filesusr.com/ugd/80fd5d_fea6b12d6ceb44e1a558ec2f8dee7fde.pdf?index=trueIn PDF document text
    • http://piwakitidi.onlinewebshop.net/how_to_replace_switch_on_kitchenaid_mixer.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/child_education_allowance_form_for_postal_employee.pdfIn PDF document text
    • http://jumepenitujox.atwebpages.com/what_is_the_effect_of_english_language.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/camelot_sound_easy_mix_system.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAC 5512 bytes
SHA-256: e5e95b99479568d835ba11451c5a59df9eba020a212df78d614e6c84d65c52c8
font_01_sfnt_off00010158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10158 9972 bytes
SHA-256: 644041e2dd92a0b4f41427d95f8727b4b4effe1437ec36a670e579d7efd20670

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