Malicious PDF — malware analysis report

Static analysis result for SHA-256 51e5bacad5599e0b…

MALICIOUS

PDF

76.4 KB Created: 2021-03-06 07:18:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cfa38cea93f86891336337f75ac2d16d SHA-1: 97747b2e92e703d1a3144e31de6652489c335412 SHA-256: 51e5bacad5599e0b73258381203fe8a07a35774b14322c7d6912b56bb592dfad
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9995

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://dugedepap.ru/wix?keyword=fillmore+charlotte+jobs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481422/normal_600c82a54b5f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418973/normal_602f347c29224.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365646/normal_5fc5f22373426.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384142/normal_5fcef4cd986c3.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/kiguteperilodu/90768571752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58528efa-8b30-4f7f-9c1c-497322e3bc98/xekeradutitutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8083fc4d-5bde-4877-91f8-76b5237e0574/in_your_own_understanding_what_is_literature_all_about_brainly.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/82069699853.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a307264a-0d82-4de7-89a2-2ad493cdd29e/dutelobidabiti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c315fb01-0861-4b02-ae21-ca68bd5d9714/how_to_install_tp_link_powerline_adapter.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/92122800318.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/green_screen_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2f3466b-4072-4f2e-b3ef-75ec9301f2ed/misal_romano_espanol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60803caa-80d9-4e26-93fa-abe3067d97f6/kemper_profiler_powerhead_manual.pdfIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_26544c2a982f4a4f8d07dae31159bb7a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0522011-c92a-4dba-a9ca-c39e75c9c62b/what_makes_a_good_person_poem.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/joxosiperaxufivamosix.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/nabepupivalazaf.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/49293044391.pdfIn PDF document text
    • https://da54c32a-99c7-4590-8520-800dd2d1cae3.filesusr.com/ugd/7973d2_7ec22a11c52f482fa97417e4275d19cd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7eda825-3769-482d-aaf2-0b406c67bcd6/can_you_nap_with_disposable_contact_lenses.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/avent_microwave_sterilizer_vs._electric.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_off0000ed63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED63 5208 bytes
SHA-256: abed1ed005d512f4e1419c4139ec35729911252634c2bb3762a2f3daa062b76d
font_01_sfnt_off0000feed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEED 10832 bytes
SHA-256: 8df61a156a3135c5a8c71cb8fde39b472c1d1275bdca80d71fde64f74d68419f

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