Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae4d1bf4fbc3584…

MALICIOUS

PDF

76.8 KB Created: 2021-03-21 03:57:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5229429547dd85f2785dccf764ca21f2 SHA-1: 97b8027674b97895647acf13f42034baef220db3 SHA-256: 5ae4d1bf4fbc3584473d084b661550c77c4e8ef65fa0054f30c209a8b878a882
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 0.9998

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://dugedepap.ru/wix?keyword=factor+label+worksheet+answer+key PDF link annotation
    • https://kofiserifopame.weebly.com/uploads/1/3/2/7/132741397/f8b3cc332b963.pdfIn PDF document text
    • https://ribupawotomimam.weebly.com/uploads/1/3/4/6/134694318/3264164.pdfIn PDF document text
    • https://gimitowogavu.weebly.com/uploads/1/3/4/7/134746983/6d5000851.pdfIn PDF document text
    • https://keregejuvuja.weebly.com/uploads/1/3/4/3/134345288/mebepolarup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7980b0ff-2efe-48f4-a442-6c87bca80713.filesusr.com/ugd/9bd8c3_e05d4141ffcc41acae7f2c3a7fab9bbb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/regular_verb_list_english_to_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/good_food_guide_awards_wa.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/86310046069.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/governana_de_tecnologia_da_informao.pdfIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_1ec36096b49548569c24b472c4af7b0f.pdf?index=trueIn PDF document text
    • https://ebd157e6-94c3-4ff5-b3ab-516f87acbde6.filesusr.com/ugd/e87473_338283b913f84f1b88fc7c972c90db70.pdf?index=trueIn PDF document text
    • http://puxedevonizu.epizy.com/advanced_excel_tutorial_with_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/biforofosagafob.pdfIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_b1b3054956ed445c8d15c880d285e6a2.pdf?index=trueIn PDF document text
    • https://75e6d08a-b14f-4c2c-bd4e-3e6431d9d11c.filesusr.com/ugd/497a87_9ad1754e0f834085a21d08e50f705c17.pdf?index=trueIn PDF document text
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_61dd03f4b6d444e5ac79cc8f4155a3bd.pdf?index=trueIn PDF document text
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_2cf513d69f9e46a1a38c71244af7d6b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/rivevigobabamo.pdfIn PDF document text
    • http://nerokezixuzat.epizy.com/best_small_food_processor_consumer_reports.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_off0000f1ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EC 5240 bytes
SHA-256: 8ee7365bec7afeb1bb3036e1180a290af4a92bdf218cf3d287f0dc8aeee974a0
font_01_sfnt_off000103cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CF 10268 bytes
SHA-256: c7521fabcc06decf391891dc907b5e5a4e51554414c6b0b9db74228f7a38c6ca

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