Malicious PDF — malware analysis report

Static analysis result for SHA-256 112e0d2cebaa2e23…

MALICIOUS

PDF

72.4 KB Created: 2021-03-17 14:31:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6ef55450fbf808a25316db366f0316e3 SHA-1: 9fb675373270c9414ed438fb1174a67a426cbd79 SHA-256: 112e0d2cebaa2e2305c8101deabe5417a618769430498a32b5ef27eaebab7e83
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. It contains a large number of external links, suggesting a link farm or redirection mechanism. The primary malicious URL identified is https://druttle.ru/award?keyword=best+company+portfolio+pdf, which is likely used to host malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/award?keyword=best+company+portfolio+pdf PDF link annotation
    • https://kijapipova.weebly.com/uploads/1/3/1/4/131407887/puzagif-toxizuwizu.pdfIn PDF document text
    • https://degobevotu.weebly.com/uploads/1/3/4/3/134393677/6292222.pdfIn PDF document text
    • https://pezevibasa.weebly.com/uploads/1/3/5/3/135306661/57d44023b5eac0.pdfIn PDF document text
    • https://wudumimimi.weebly.com/uploads/1/3/4/3/134356267/rezifal-nitovasuv.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/dexodekelaseki/ck17_endodontic_explorer_full_form.pdfIn PDF document text
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_5cde26eee4d94eca8c95caa616e02ef3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/lab_attendant_answer_key_2018_evening_session.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/stairway_to_heaven_lyrics_and_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/label_a_plant_cell_worksheet_answers.pdfIn PDF document text
    • https://711a90e7-97f2-4eab-8690-3003ec1e9b64.filesusr.com/ugd/a0905b_8d7a936fe1f14d90acea7d0835ce872d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/226b4d1f-5574-477d-84c3-21226a65548a/toretoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f1aa12f-1e9e-420e-a57d-d6424a49e385/download_soal_mhq_juz_30.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dec8de7-02d0-4756-b21a-380e99a6bc32/49023511950.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/feeling_good_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/app_store_connect_to_wifi_to.pdfIn PDF document text
    • https://47e4df30-8702-49a4-8bd5-327e1546ff06.filesusr.com/ugd/379272_bf74df282141452e9236869bad6ed992.pdf?index=trueIn PDF document text
    • https://be56f97b-0727-4a8e-a141-4155b83e75ac.filesusr.com/ugd/5034d0_ff6e80945aae4de1a1803f71d1f91264.pdf?index=trueIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_c1a124a0497d4203b57b932f2fb90632.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a850a69f-c1c0-4bcc-be7e-e34e66e2bfbd/95888618525.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/45022687544.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/cambridge_guided_busway_bus_pass.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1ab9328-f7f1-49b6-84ad-08ea6892ac01/what_are_the_composition_of_renaissance_period.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_off0000df5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5B 5452 bytes
SHA-256: 0723be9d28b6ec683d5ece0866638dffde1069c24e12437c235274a9b0f527bb
font_01_sfnt_off0000f1d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D9 10116 bytes
SHA-256: 8757fdc2cc406bd69ac30db194a9c47e7ad9cc8293c194e579b99309c5cf70f9

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