Malicious PDF — malware analysis report

Static analysis result for SHA-256 70be19b89da7bd0d…

MALICIOUS

PDF

75.8 KB Created: 2021-04-28 20:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f55bc8e4a2961b3d8d4d4627e4d3fef9 SHA-1: 106008c415f2717db5ffafc8c19d07d1d1bfbc29 SHA-256: 70be19b89da7bd0da3bb7c7fcfa8b05130479b07cda48aeb6fdde4d1033b8e0e
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 0.9997

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://nipisod.ru/strik?utm_term=parts+of+speech+with+examples+sentences PDF link annotation
    • https://cdn.sqhk.co/setawigiz/gcxcEie/topps_2019_uefa_champions_league_museum_collection.pdfIn PDF document text
    • https://cdn.sqhk.co/palezubifo/jjjhjUp/lynx_house_cat_hybrid_for_sale.pdfIn PDF document text
    • https://zodukaveg.weebly.com/uploads/1/3/5/3/135345947/9528227.pdfIn PDF document text
    • https://vexuneka.weebly.com/uploads/1/3/4/5/134584550/povife.pdfIn PDF document text
    • https://cdn.sqhk.co/sebidurubuze/hgrjeia/15264702874.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/jcGjjhj/famuselo.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/yUjhOie/kidafodalatariforinoporeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://91953a53-6f32-4f2a-9b2e-0f954541ff31.filesusr.com/ugd/dad90e_806bcc24f1c74a0ba01c2414dbe0eb37.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/manual_tecnico_john_deere_2140.pdfIn PDF document text
    • https://ab25a8b3-4d80-4d4b-93a1-c1347014fa7c.filesusr.com/ugd/8d0191_b9caf597f04247349bd2d5d0270bd645.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/s._w._a._t_full_form.pdfIn PDF document text
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_47f3b4505e6d48e08b427f8daa3380a9.pdf?index=trueIn PDF document text
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_69b18e0a0b9f44c08edc42d32e329f77.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wuniku/dulukilazekofixolaxun.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/aptoide_apk_free_ios.pdfIn PDF document text
    • https://91e55214-10ad-44cf-a10a-60a9392df58b.filesusr.com/ugd/e1c37d_b5b09ad7098d44a5998eb1f9f6491305.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/salade/sylvania_portable_dvd_player_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/slcc_english_1010_course_description.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/what_is_the_horsepower_of_a_massey_ferguson_165.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/pudepakobi.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_off0000eb2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2F 5416 bytes
SHA-256: 4d4c98e8b777b3e025bf72f60602c5c64897839e3f2be7ed47858031ad769956
font_01_sfnt_off0000fd8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8D 10732 bytes
SHA-256: c550edf62939fe42af92252e60724209500f908d8aa1fa8563d0f2a00f9b3c38

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