Malicious PDF — malware analysis report

Static analysis result for SHA-256 75dfce00c40c5d64…

MALICIOUS

PDF

83.3 KB Created: 2021-04-25 16:51:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 09b0eba209a00471be5ea24bde141987 SHA-1: 50808108b6d88aa5ad7f11c95bef606a89a660c3 SHA-256: 75dfce00c40c5d64c211c394837e9b0ca265d3946b3f18b76c872f337bd8d1cb
186 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 0.9991

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?utm_term=g+shock+mrg+g1000b+price PDF link annotation
    • https://rovenefewapug.weebly.com/uploads/1/3/0/7/130775308/wodinafonirixemazodo.pdfIn PDF document text
    • https://zuxibonidape.weebly.com/uploads/1/3/4/8/134889984/miwesikokaxuva_sibewuziwisi_nasedujezu_wagos.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/how_to_cook_rainbow_trout_fillets_uk.pdfIn PDF document text
    • http://polobasopika.mywebcommunity.org/ncert_biology_objective_questions.pdfIn PDF document text
    • http://pedagodogiko.getenjoyment.net/79193841516.pdfIn PDF document text
    • https://dapemoko.weebly.com/uploads/1/3/4/6/134647299/xekurobasikipipav.pdfIn PDF document text
    • https://rewojomivatal.weebly.com/uploads/1/3/5/3/135345623/2f56df4c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e06e8306-d71e-4c92-aa1b-e8c52eeb44cb.filesusr.com/ugd/bc4951_5069b70dceb247f6be43eb6c76b29535.pdf?index=trueIn PDF document text
    • https://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_98bff93142c1405e96491fb2e98dea3f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sazixipame/international_marketing_group_newsletter.pdfIn PDF document text
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_952202412efe4ce3990c349c3fbba5ee.pdf?index=trueIn PDF document text
    • https://e216d865-ddc7-438b-99b2-64609380b1bb.filesusr.com/ugd/7ae8b3_2d591cc9fa2743e5ae1a7cd3837debf6.pdf?index=trueIn PDF document text
    • https://63aa7d51-6c54-48cc-ac87-b710a0da19c3.filesusr.com/ugd/c8d394_21a19c04b8fb495f85d2e3c0151e6834.pdf?index=trueIn PDF document text
    • http://sunuwib.epizy.com/gerepanobovakeranekegegoz.pdfIn PDF document text
    • https://667b589a-70dd-4c78-a03f-47f6e9f07b1f.filesusr.com/ugd/db80c5_25a66b488d254b25908e2baeed711c29.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/dooars_tourist_guide.pdfIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_b0a3a4036fb04a078fa429a4fc5a6df9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zijivevip/vosutezumifewuminak.pdfIn PDF document text
    • http://redotikami.rf.gd/kifaferopubixo.pdfIn PDF document text
    • http://modufowiz.rf.gd/vowibivezubituwero.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/fiwelaseboxaronamo.pdfIn PDF document text
    • https://436c154b-1c2d-4c60-9768-ed3a268ef5e1.filesusr.com/ugd/e8e253_6cc30f03de4d4afc8c8fd21589686c63.pdf?index=trueIn PDF document text
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_b36a7548cc4f4fd6acbacdad34fae1c8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/79396338570.pdfIn PDF document text
    • http://lafeseg.rf.gd/smartsheet_gantt_chart.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_off0001075b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075B 5532 bytes
SHA-256: fe1ab737d2fdd995975eea2ff888e688fe90c6ef5cb67d5dae3b962dfa6483f2
font_01_sfnt_off00011a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0E 10900 bytes
SHA-256: 10734c711a25b7ce6f5862daa2ec2cc18fbba561e0cbe48bd7646319091c0197