Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d7efdae39bad8c…

MALICIOUS

PDF

84.3 KB Created: 2021-03-29 03:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4a378717a946ea8a437cf9a50661c09b SHA-1: 50b22278bea0587ea86f833fabe2ed9c35aa3baf SHA-256: d7d7efdae39bad8c86d71626ed57040bb97f105524b61ecc16bf5c757c14a39c
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 0.9958

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://soxebez.ru/wix?keyword=watch+the+dark+knight+rises+online+free+dailymotion PDF link annotation
    • https://kafijojiwagovi.weebly.com/uploads/1/3/5/3/135387916/temedobadogav.pdfIn PDF document text
    • https://zepitobazelaki.weebly.com/uploads/1/3/4/6/134619491/soseladujulub.pdfIn PDF document text
    • https://xugibadibexupov.weebly.com/uploads/1/3/4/6/134684970/9670921.pdfIn PDF document text
    • https://lifalaril.weebly.com/uploads/1/3/4/8/134883644/f581dec3.pdfIn PDF document text
    • https://mewifukemi.weebly.com/uploads/1/3/4/7/134764424/7ec0e5d.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/safago/programming_job_interview_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/100e014f-8466-43da-aa9d-f15155066ad4/phantom_of_the_opera_scenes_explained.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/bawofuw.pdfIn PDF document text
    • https://4eff3ec4-d147-45d1-be73-876d9e1d0019.filesusr.com/ugd/efb3f0_0c15bd23e1194e00bb112f07b7507e39.pdf?index=trueIn PDF document text
    • https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_9ef295075faf4506858cee379102e00d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea92a035-905f-47d8-9b7f-328516e512b5/everything_would_be_fine_meaning_in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/248deb8b-cdd3-4862-acc4-a918a88a3ea0/gukezovoberaxulaxejakelog.pdfIn PDF document text
    • https://d0aee4dd-c5bf-4c29-adcf-3aa844f59ef3.filesusr.com/ugd/193d13_0e3b86f72be04630bb9650225a93e95b.pdf?index=trueIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_fbcca7052a0242b7abf0c7e907251185.pdf?index=trueIn PDF document text
    • https://b8e64ff8-a522-4625-8e91-70fe47930cb2.filesusr.com/ugd/37987b_f14accca2d074c40bd5290860309aeab.pdf?index=trueIn PDF document text
    • https://e668d0bc-6b9c-4787-ac64-5363b724ef62.filesusr.com/ugd/6ec699_b09a6069e30043399f9189127038ebed.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/sinepoju.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/final_frca_saq_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49d6cb0e-b58f-4672-ab3c-c83470160b4f/77166647775.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/phone_answering_service_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/black_and_decker_coffee_maker.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/vosezuwuwunaxumabiz.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/asus_crosshair_iv_formula_usb_3.0_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/asp.net_core_2.0_tutorial_in_hindi.pdfIn PDF document text
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_29bae247adf443508c4ae0fcf362738e.pdf?index=trueIn PDF document text
    • https://1c896d37-30d1-4b4d-9537-98f963aae812.filesusr.com/ugd/865d50_a7819ac2e1464f26a541f0f66fc20b77.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6344ca4e-da5d-459a-bb96-41054e04590d/89796958971.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_off000109be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BE 5616 bytes
SHA-256: 53d9bab1f6b194b765fa3dd7b4fd4309d80ce781acdc4fccc0293ba34b9eb76e
font_01_sfnt_off00011cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC5 11080 bytes
SHA-256: 7adf16ee5178409273b7a0bddd09acd1fb8d9997fa89450787aa21a1167a1ebb